Make 5 5 5 5 = 19 [closed]
Clash Royale CLAN TAG#URR8PPP
up vote
22
down vote
favorite
Can you find a way to make:
$5 5 5 5 = 19$
by adding any operations or symbols? You can use only these symbols:
$+, -, *, !, /, hat, , ()$.
It is limited to this list, and concatenation is also allowed. You cannot add other numbers to the equation.
mathematics formation-of-numbers number-theory
edited Aug 28 at 23:43
Community♦
1
asked Aug 26 at 23:27
kraby15
2,2662730
closed as too broad by Rubio♦ Aug 29 at 13:36
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |Â
up vote
22
down vote
favorite
Can you find a way to make:
$5 5 5 5 = 19$
by adding any operations or symbols? You can use only these symbols:
$+, -, *, !, /, hat, , ()$.
It is limited to this list, and concatenation is also allowed. You cannot add other numbers to the equation.
mathematics formation-of-numbers number-theory
edited Aug 28 at 23:43
Community♦
1
asked Aug 26 at 23:27
kraby15
2,2662730
closed as too broad by Rubio♦ Aug 29 at 13:36
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Comments are not for extended discussion; this conversation has been moved to chat. If you have legitimate questions about the puzzle statement, including allowed operations and the like, ask them (to the OP) or include your assumptions in your answer as others have done; debating them with other users is a fairly fruitless exercise, and not what comments are for in any case.
– Rubio♦
Aug 28 at 14:58
1
The amount of solutions is likely to be too big. I am not sure if answers putting operations between 1 and 9 are valid. BTW, came up with different solution which is, I guess, uninteresting (because there already are too many) and anyway I can't post an answer.
– rus9384
Aug 28 at 19:38
There are lots of possible solutions for this question. A lot of good answers have been given too. It would be nice if one got accepted and the question closed or else it feels like it is too broad with a lot of correct answers.
– R.D
Aug 29 at 12:05
add a comment |Â
up vote
22
down vote
favorite
up vote
22
down vote
favorite
Can you find a way to make:
$5 5 5 5 = 19$
by adding any operations or symbols? You can use only these symbols:
$+, -, *, !, /, hat, , ()$.
It is limited to this list, and concatenation is also allowed. You cannot add other numbers to the equation.
mathematics formation-of-numbers number-theory
edited Aug 28 at 23:43
Community♦
1
asked Aug 26 at 23:27
kraby15
2,2662730
Can you find a way to make:
$5 5 5 5 = 19$
by adding any operations or symbols? You can use only these symbols:
$+, -, *, !, /, hat, , ()$.
It is limited to this list, and concatenation is also allowed. You cannot add other numbers to the equation.
mathematics formation-of-numbers number-theory
edited Aug 28 at 23:43
Community♦
1
asked Aug 26 at 23:27
kraby15
2,2662730
edited Aug 28 at 23:43
Community♦
1
edited Aug 28 at 23:43
Community♦
1
edited Aug 28 at 23:43
Community♦
1
1
asked Aug 26 at 23:27
kraby15
2,2662730
asked Aug 26 at 23:27
kraby15
2,2662730
asked Aug 26 at 23:27
kraby15
2,2662730
2,2662730
closed as too broad by Rubio♦ Aug 29 at 13:36
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as too broad by Rubio♦ Aug 29 at 13:36
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Comments are not for extended discussion; this conversation has been moved to chat. If you have legitimate questions about the puzzle statement, including allowed operations and the like, ask them (to the OP) or include your assumptions in your answer as others have done; debating them with other users is a fairly fruitless exercise, and not what comments are for in any case.
– Rubio♦
Aug 28 at 14:58
1
The amount of solutions is likely to be too big. I am not sure if answers putting operations between 1 and 9 are valid. BTW, came up with different solution which is, I guess, uninteresting (because there already are too many) and anyway I can't post an answer.
– rus9384
Aug 28 at 19:38
There are lots of possible solutions for this question. A lot of good answers have been given too. It would be nice if one got accepted and the question closed or else it feels like it is too broad with a lot of correct answers.
– R.D
Aug 29 at 12:05
add a comment |Â
Comments are not for extended discussion; this conversation has been moved to chat. If you have legitimate questions about the puzzle statement, including allowed operations and the like, ask them (to the OP) or include your assumptions in your answer as others have done; debating them with other users is a fairly fruitless exercise, and not what comments are for in any case.
– Rubio♦
Aug 28 at 14:58
1
The amount of solutions is likely to be too big. I am not sure if answers putting operations between 1 and 9 are valid. BTW, came up with different solution which is, I guess, uninteresting (because there already are too many) and anyway I can't post an answer.
– rus9384
Aug 28 at 19:38
There are lots of possible solutions for this question. A lot of good answers have been given too. It would be nice if one got accepted and the question closed or else it feels like it is too broad with a lot of correct answers.
– R.D
Aug 29 at 12:05
Comments are not for extended discussion; this conversation has been moved to chat. If you have legitimate questions about the puzzle statement, including allowed operations and the like, ask them (to the OP) or include your assumptions in your answer as others have done; debating them with other users is a fairly fruitless exercise, and not what comments are for in any case.
– Rubio♦
Aug 28 at 14:58
Comments are not for extended discussion; this conversation has been moved to chat. If you have legitimate questions about the puzzle statement, including allowed operations and the like, ask them (to the OP) or include your assumptions in your answer as others have done; debating them with other users is a fairly fruitless exercise, and not what comments are for in any case.
– Rubio♦
Aug 28 at 14:58
1
1
The amount of solutions is likely to be too big. I am not sure if answers putting operations between 1 and 9 are valid. BTW, came up with different solution which is, I guess, uninteresting (because there already are too many) and anyway I can't post an answer.
– rus9384
Aug 28 at 19:38
The amount of solutions is likely to be too big. I am not sure if answers putting operations between 1 and 9 are valid. BTW, came up with different solution which is, I guess, uninteresting (because there already are too many) and anyway I can't post an answer.
– rus9384
Aug 28 at 19:38
There are lots of possible solutions for this question. A lot of good answers have been given too. It would be nice if one got accepted and the question closed or else it feels like it is too broad with a lot of correct answers.
– R.D
Aug 29 at 12:05
There are lots of possible solutions for this question. A lot of good answers have been given too. It would be nice if one got accepted and the question closed or else it feels like it is too broad with a lot of correct answers.
– R.D
Aug 29 at 12:05
add a comment |Â
10 Answers
10
active
oldest
votes
up vote
51
down vote
accepted
Here's one way I found:
$dfrac5!-(5times 5)5=19$
Or, using just the characters explicitly allowed in the question:
(5! - (5 * 5)) / 5 = 19
answered Aug 26 at 23:50
Riley
10.5k43170
Somebody upvote once more (I already have)! It's a great answer and @Riley's nearly on $10k$ reputation! :D
– user477343
Aug 29 at 15:04
@user477343 Thank you! I will now use my powers responsibly.
– Riley
Aug 29 at 17:04
Well, after those Riley riddles you made, I think you quite deserve it :)
– user477343
Aug 29 at 21:41
add a comment |Â
up vote
38
down vote
If the double factorial is allowed, then I propose
$$5!!+5-5/5$$
WolframAlpha agrees that the result is 19.
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
add a comment |Â
up vote
31
down vote
I am quite sure it is not the expected answer but it is the immediate answer comes into my mind.
$frac5+55+5=1^9$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 7:09
Keith
32114
1
I like this one (+1), as my immediate answer (with fewer symbols) would be similar, alternating division and multiplication, while keeping the same right-hand side as yours. (Meta: I'm not writing my solution in the comment in order to avoid spoiling, as rot13 wouldn't work here. Not sure what is the standard policy in this case. Should I post it as a separate answer?)
– Maiaux
Aug 27 at 16:06
@Maiaux if it is really similar, do not post it as a seperate answer. This has happened before here, where a user deleted his/her answer (I won't name who, exactly) for its similarity compared to another answer.
– user477343
Aug 29 at 15:06
add a comment |Â
up vote
26
down vote
For the 5s
$$left(5 - frac55right)! - 5 = 19 $$
For the 1s (previous edit)
$$(1+1+1)!-1=5$$
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
add a comment |Â
up vote
18
down vote
My way:
$(5+5)timesfrac55=1+9$
and
$(5+5)-frac55=1times9$
New, and added for it's simplicity:
$5+5+5-5=1+9$
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
add a comment |Â
up vote
16
down vote
In base-11, the trivial addition works:
$$ 5_11 + 5_11 + 5_11 + 5_11 = 19_11 $$
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
answered Aug 27 at 3:51
ilkkachu
63039
1
Those subscript 1s could be considered other numbers?
– Viktor Mellgren
Aug 27 at 8:54
7
just remove the subscripts they are not needed (can we not as usual ignore the number base).
– ctrl-alt-delor
Aug 27 at 9:04
add a comment |Â
up vote
14
down vote
5555 != 19 : Credit : Jonathan Allan
1
Is this now an equation?
– ctrl-alt-delor
Aug 27 at 9:05
add a comment |Â
up vote
3
down vote
From the comment above
5555 ≠19
add a comment |Â
up vote
3
down vote
One way to think of it -
19 HEX = 25 DEC
Therefore -
$frac 5 5 * 5 * 5 = 25$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 20:51
Charlok
70646
add a comment |Â
up vote
1
down vote
(5! - 5 * 5) / 5 = 19
(120 - 25) / 5 = 19
95 / 5 = 19
or
5 + 5 + 5 - 5 = 1 + 9
answered Aug 28 at 14:13
user51872
30112
add a comment |Â
protected by Community♦ Aug 27 at 8:12
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
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10 Answers
10
active
oldest
votes
10 Answers
10
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
51
down vote
accepted
Here's one way I found:
$dfrac5!-(5times 5)5=19$
Or, using just the characters explicitly allowed in the question:
(5! - (5 * 5)) / 5 = 19
answered Aug 26 at 23:50
Riley
10.5k43170
Somebody upvote once more (I already have)! It's a great answer and @Riley's nearly on $10k$ reputation! :D
– user477343
Aug 29 at 15:04
@user477343 Thank you! I will now use my powers responsibly.
– Riley
Aug 29 at 17:04
Well, after those Riley riddles you made, I think you quite deserve it :)
– user477343
Aug 29 at 21:41
add a comment |Â
up vote
51
down vote
accepted
Here's one way I found:
$dfrac5!-(5times 5)5=19$
Or, using just the characters explicitly allowed in the question:
(5! - (5 * 5)) / 5 = 19
answered Aug 26 at 23:50
Riley
10.5k43170
Somebody upvote once more (I already have)! It's a great answer and @Riley's nearly on $10k$ reputation! :D
– user477343
Aug 29 at 15:04
@user477343 Thank you! I will now use my powers responsibly.
– Riley
Aug 29 at 17:04
Well, after those Riley riddles you made, I think you quite deserve it :)
– user477343
Aug 29 at 21:41
add a comment |Â
up vote
51
down vote
accepted
up vote
51
down vote
accepted
Here's one way I found:
$dfrac5!-(5times 5)5=19$
Or, using just the characters explicitly allowed in the question:
(5! - (5 * 5)) / 5 = 19
answered Aug 26 at 23:50
Riley
10.5k43170
Here's one way I found:
$dfrac5!-(5times 5)5=19$
Or, using just the characters explicitly allowed in the question:
(5! - (5 * 5)) / 5 = 19
answered Aug 26 at 23:50
Riley
10.5k43170
edited Aug 28 at 22:50
answered Aug 26 at 23:50
Riley
10.5k43170
answered Aug 26 at 23:50
Riley
10.5k43170
answered Aug 26 at 23:50
Riley
10.5k43170
10.5k43170
Somebody upvote once more (I already have)! It's a great answer and @Riley's nearly on $10k$ reputation! :D
– user477343
Aug 29 at 15:04
@user477343 Thank you! I will now use my powers responsibly.
– Riley
Aug 29 at 17:04
Well, after those Riley riddles you made, I think you quite deserve it :)
– user477343
Aug 29 at 21:41
add a comment |Â
Somebody upvote once more (I already have)! It's a great answer and @Riley's nearly on $10k$ reputation! :D
– user477343
Aug 29 at 15:04
@user477343 Thank you! I will now use my powers responsibly.
– Riley
Aug 29 at 17:04
Well, after those Riley riddles you made, I think you quite deserve it :)
– user477343
Aug 29 at 21:41
Somebody upvote once more (I already have)! It's a great answer and @Riley's nearly on $10k$ reputation! :D
– user477343
Aug 29 at 15:04
Somebody upvote once more (I already have)! It's a great answer and @Riley's nearly on $10k$ reputation! :D
– user477343
Aug 29 at 15:04
@user477343 Thank you! I will now use my powers responsibly.
– Riley
Aug 29 at 17:04
@user477343 Thank you! I will now use my powers responsibly.
– Riley
Aug 29 at 17:04
Well, after those Riley riddles you made, I think you quite deserve it :)
– user477343
Aug 29 at 21:41
Well, after those Riley riddles you made, I think you quite deserve it :)
– user477343
Aug 29 at 21:41
add a comment |Â
up vote
38
down vote
If the double factorial is allowed, then I propose
$$5!!+5-5/5$$
WolframAlpha agrees that the result is 19.
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
add a comment |Â
up vote
38
down vote
If the double factorial is allowed, then I propose
$$5!!+5-5/5$$
WolframAlpha agrees that the result is 19.
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
add a comment |Â
up vote
38
down vote
up vote
38
down vote
If the double factorial is allowed, then I propose
$$5!!+5-5/5$$
WolframAlpha agrees that the result is 19.
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
If the double factorial is allowed, then I propose
$$5!!+5-5/5$$
WolframAlpha agrees that the result is 19.
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
answered Aug 27 at 3:09
Anastasiya-Romanova 秀
55118
55118
add a comment |Â
add a comment |Â
up vote
31
down vote
I am quite sure it is not the expected answer but it is the immediate answer comes into my mind.
$frac5+55+5=1^9$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 7:09
Keith
32114
1
I like this one (+1), as my immediate answer (with fewer symbols) would be similar, alternating division and multiplication, while keeping the same right-hand side as yours. (Meta: I'm not writing my solution in the comment in order to avoid spoiling, as rot13 wouldn't work here. Not sure what is the standard policy in this case. Should I post it as a separate answer?)
– Maiaux
Aug 27 at 16:06
@Maiaux if it is really similar, do not post it as a seperate answer. This has happened before here, where a user deleted his/her answer (I won't name who, exactly) for its similarity compared to another answer.
– user477343
Aug 29 at 15:06
add a comment |Â
up vote
31
down vote
I am quite sure it is not the expected answer but it is the immediate answer comes into my mind.
$frac5+55+5=1^9$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 7:09
Keith
32114
1
I like this one (+1), as my immediate answer (with fewer symbols) would be similar, alternating division and multiplication, while keeping the same right-hand side as yours. (Meta: I'm not writing my solution in the comment in order to avoid spoiling, as rot13 wouldn't work here. Not sure what is the standard policy in this case. Should I post it as a separate answer?)
– Maiaux
Aug 27 at 16:06
@Maiaux if it is really similar, do not post it as a seperate answer. This has happened before here, where a user deleted his/her answer (I won't name who, exactly) for its similarity compared to another answer.
– user477343
Aug 29 at 15:06
add a comment |Â
up vote
31
down vote
up vote
31
down vote
I am quite sure it is not the expected answer but it is the immediate answer comes into my mind.
$frac5+55+5=1^9$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 7:09
Keith
32114
I am quite sure it is not the expected answer but it is the immediate answer comes into my mind.
$frac5+55+5=1^9$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 7:09
Keith
32114
edited Aug 28 at 4:42
kraby15
2,2662730
edited Aug 28 at 4:42
kraby15
2,2662730
edited Aug 28 at 4:42
kraby15
2,2662730
2,2662730
answered Aug 27 at 7:09
Keith
32114
answered Aug 27 at 7:09
Keith
32114
answered Aug 27 at 7:09
Keith
32114
32114
1
I like this one (+1), as my immediate answer (with fewer symbols) would be similar, alternating division and multiplication, while keeping the same right-hand side as yours. (Meta: I'm not writing my solution in the comment in order to avoid spoiling, as rot13 wouldn't work here. Not sure what is the standard policy in this case. Should I post it as a separate answer?)
– Maiaux
Aug 27 at 16:06
@Maiaux if it is really similar, do not post it as a seperate answer. This has happened before here, where a user deleted his/her answer (I won't name who, exactly) for its similarity compared to another answer.
– user477343
Aug 29 at 15:06
add a comment |Â
1
I like this one (+1), as my immediate answer (with fewer symbols) would be similar, alternating division and multiplication, while keeping the same right-hand side as yours. (Meta: I'm not writing my solution in the comment in order to avoid spoiling, as rot13 wouldn't work here. Not sure what is the standard policy in this case. Should I post it as a separate answer?)
– Maiaux
Aug 27 at 16:06
@Maiaux if it is really similar, do not post it as a seperate answer. This has happened before here, where a user deleted his/her answer (I won't name who, exactly) for its similarity compared to another answer.
– user477343
Aug 29 at 15:06
1
1
I like this one (+1), as my immediate answer (with fewer symbols) would be similar, alternating division and multiplication, while keeping the same right-hand side as yours. (Meta: I'm not writing my solution in the comment in order to avoid spoiling, as rot13 wouldn't work here. Not sure what is the standard policy in this case. Should I post it as a separate answer?)
– Maiaux
Aug 27 at 16:06
I like this one (+1), as my immediate answer (with fewer symbols) would be similar, alternating division and multiplication, while keeping the same right-hand side as yours. (Meta: I'm not writing my solution in the comment in order to avoid spoiling, as rot13 wouldn't work here. Not sure what is the standard policy in this case. Should I post it as a separate answer?)
– Maiaux
Aug 27 at 16:06
@Maiaux if it is really similar, do not post it as a seperate answer. This has happened before here, where a user deleted his/her answer (I won't name who, exactly) for its similarity compared to another answer.
– user477343
Aug 29 at 15:06
@Maiaux if it is really similar, do not post it as a seperate answer. This has happened before here, where a user deleted his/her answer (I won't name who, exactly) for its similarity compared to another answer.
– user477343
Aug 29 at 15:06
add a comment |Â
up vote
26
down vote
For the 5s
$$left(5 - frac55right)! - 5 = 19 $$
For the 1s (previous edit)
$$(1+1+1)!-1=5$$
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
add a comment |Â
up vote
26
down vote
For the 5s
$$left(5 - frac55right)! - 5 = 19 $$
For the 1s (previous edit)
$$(1+1+1)!-1=5$$
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
add a comment |Â
up vote
26
down vote
up vote
26
down vote
For the 5s
$$left(5 - frac55right)! - 5 = 19 $$
For the 1s (previous edit)
$$(1+1+1)!-1=5$$
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
For the 5s
$$left(5 - frac55right)! - 5 = 19 $$
For the 1s (previous edit)
$$(1+1+1)!-1=5$$
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
edited Aug 27 at 3:56
JonMark Perry
13.7k42667
13.7k42667
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
answered Aug 26 at 23:52
Bennett Bernardoni
2,073415
2,073415
add a comment |Â
add a comment |Â
up vote
18
down vote
My way:
$(5+5)timesfrac55=1+9$
and
$(5+5)-frac55=1times9$
New, and added for it's simplicity:
$5+5+5-5=1+9$
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
add a comment |Â
up vote
18
down vote
My way:
$(5+5)timesfrac55=1+9$
and
$(5+5)-frac55=1times9$
New, and added for it's simplicity:
$5+5+5-5=1+9$
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
add a comment |Â
up vote
18
down vote
up vote
18
down vote
My way:
$(5+5)timesfrac55=1+9$
and
$(5+5)-frac55=1times9$
New, and added for it's simplicity:
$5+5+5-5=1+9$
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
My way:
$(5+5)timesfrac55=1+9$
and
$(5+5)-frac55=1times9$
New, and added for it's simplicity:
$5+5+5-5=1+9$
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
edited Aug 28 at 4:10
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
answered Aug 27 at 4:11
JonMark Perry
13.7k42667
13.7k42667
add a comment |Â
add a comment |Â
up vote
16
down vote
In base-11, the trivial addition works:
$$ 5_11 + 5_11 + 5_11 + 5_11 = 19_11 $$
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
answered Aug 27 at 3:51
ilkkachu
63039
1
Those subscript 1s could be considered other numbers?
– Viktor Mellgren
Aug 27 at 8:54
7
just remove the subscripts they are not needed (can we not as usual ignore the number base).
– ctrl-alt-delor
Aug 27 at 9:04
add a comment |Â
up vote
16
down vote
In base-11, the trivial addition works:
$$ 5_11 + 5_11 + 5_11 + 5_11 = 19_11 $$
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
answered Aug 27 at 3:51
ilkkachu
63039
1
Those subscript 1s could be considered other numbers?
– Viktor Mellgren
Aug 27 at 8:54
7
just remove the subscripts they are not needed (can we not as usual ignore the number base).
– ctrl-alt-delor
Aug 27 at 9:04
add a comment |Â
up vote
16
down vote
up vote
16
down vote
In base-11, the trivial addition works:
$$ 5_11 + 5_11 + 5_11 + 5_11 = 19_11 $$
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
answered Aug 27 at 3:51
ilkkachu
63039
In base-11, the trivial addition works:
$$ 5_11 + 5_11 + 5_11 + 5_11 = 19_11 $$
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
answered Aug 27 at 3:51
ilkkachu
63039
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
edited Aug 27 at 4:06
JonMark Perry
13.7k42667
13.7k42667
answered Aug 27 at 3:51
ilkkachu
63039
answered Aug 27 at 3:51
ilkkachu
63039
answered Aug 27 at 3:51
ilkkachu
63039
63039
1
Those subscript 1s could be considered other numbers?
– Viktor Mellgren
Aug 27 at 8:54
7
just remove the subscripts they are not needed (can we not as usual ignore the number base).
– ctrl-alt-delor
Aug 27 at 9:04
add a comment |Â
1
Those subscript 1s could be considered other numbers?
– Viktor Mellgren
Aug 27 at 8:54
7
just remove the subscripts they are not needed (can we not as usual ignore the number base).
– ctrl-alt-delor
Aug 27 at 9:04
1
1
Those subscript 1s could be considered other numbers?
– Viktor Mellgren
Aug 27 at 8:54
Those subscript 1s could be considered other numbers?
– Viktor Mellgren
Aug 27 at 8:54
7
7
just remove the subscripts they are not needed (can we not as usual ignore the number base).
– ctrl-alt-delor
Aug 27 at 9:04
just remove the subscripts they are not needed (can we not as usual ignore the number base).
– ctrl-alt-delor
Aug 27 at 9:04
add a comment |Â
up vote
14
down vote
5555 != 19 : Credit : Jonathan Allan
1
Is this now an equation?
– ctrl-alt-delor
Aug 27 at 9:05
add a comment |Â
up vote
14
down vote
5555 != 19 : Credit : Jonathan Allan
1
Is this now an equation?
– ctrl-alt-delor
Aug 27 at 9:05
add a comment |Â
up vote
14
down vote
up vote
14
down vote
5555 != 19 : Credit : Jonathan Allan
5555 != 19 : Credit : Jonathan Allan
answered Aug 27 at 7:10
community wiki
I am the Most Stupid Person
1
Is this now an equation?
– ctrl-alt-delor
Aug 27 at 9:05
add a comment |Â
1
Is this now an equation?
– ctrl-alt-delor
Aug 27 at 9:05
1
1
Is this now an equation?
– ctrl-alt-delor
Aug 27 at 9:05
Is this now an equation?
– ctrl-alt-delor
Aug 27 at 9:05
add a comment |Â
up vote
3
down vote
From the comment above
5555 ≠19
add a comment |Â
up vote
3
down vote
From the comment above
5555 ≠19
add a comment |Â
up vote
3
down vote
up vote
3
down vote
From the comment above
5555 ≠19
From the comment above
5555 ≠19
answered Aug 27 at 8:12
community wiki
phuclv
add a comment |Â
add a comment |Â
up vote
3
down vote
One way to think of it -
19 HEX = 25 DEC
Therefore -
$frac 5 5 * 5 * 5 = 25$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 20:51
Charlok
70646
add a comment |Â
up vote
3
down vote
One way to think of it -
19 HEX = 25 DEC
Therefore -
$frac 5 5 * 5 * 5 = 25$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 20:51
Charlok
70646
add a comment |Â
up vote
3
down vote
up vote
3
down vote
One way to think of it -
19 HEX = 25 DEC
Therefore -
$frac 5 5 * 5 * 5 = 25$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 20:51
Charlok
70646
One way to think of it -
19 HEX = 25 DEC
Therefore -
$frac 5 5 * 5 * 5 = 25$
edited Aug 28 at 4:42
kraby15
2,2662730
answered Aug 27 at 20:51
Charlok
70646
edited Aug 28 at 4:42
kraby15
2,2662730
edited Aug 28 at 4:42
kraby15
2,2662730
edited Aug 28 at 4:42
kraby15
2,2662730
2,2662730
answered Aug 27 at 20:51
Charlok
70646
answered Aug 27 at 20:51
Charlok
70646
answered Aug 27 at 20:51
Charlok
70646
70646
add a comment |Â
add a comment |Â
up vote
1
down vote
(5! - 5 * 5) / 5 = 19
(120 - 25) / 5 = 19
95 / 5 = 19
or
5 + 5 + 5 - 5 = 1 + 9
answered Aug 28 at 14:13
user51872
30112
add a comment |Â
up vote
1
down vote
(5! - 5 * 5) / 5 = 19
(120 - 25) / 5 = 19
95 / 5 = 19
or
5 + 5 + 5 - 5 = 1 + 9
answered Aug 28 at 14:13
user51872
30112
add a comment |Â
up vote
1
down vote
up vote
1
down vote
(5! - 5 * 5) / 5 = 19
(120 - 25) / 5 = 19
95 / 5 = 19
or
5 + 5 + 5 - 5 = 1 + 9
answered Aug 28 at 14:13
user51872
30112
(5! - 5 * 5) / 5 = 19
(120 - 25) / 5 = 19
95 / 5 = 19
or
5 + 5 + 5 - 5 = 1 + 9
answered Aug 28 at 14:13
user51872
30112
answered Aug 28 at 14:13
user51872
30112
answered Aug 28 at 14:13
user51872
30112
answered Aug 28 at 14:13
user51872
30112
30112
add a comment |Â
add a comment |Â
protected by Community♦ Aug 27 at 8:12
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?
Comments are not for extended discussion; this conversation has been moved to chat. If you have legitimate questions about the puzzle statement, including allowed operations and the like, ask them (to the OP) or include your assumptions in your answer as others have done; debating them with other users is a fairly fruitless exercise, and not what comments are for in any case.
– Rubio♦
Aug 28 at 14:58
1
The amount of solutions is likely to be too big. I am not sure if answers putting operations between 1 and 9 are valid. BTW, came up with different solution which is, I guess, uninteresting (because there already are too many) and anyway I can't post an answer.
– rus9384
Aug 28 at 19:38
There are lots of possible solutions for this question. A lot of good answers have been given too. It would be nice if one got accepted and the question closed or else it feels like it is too broad with a lot of correct answers.
– R.D
Aug 29 at 12:05