What number comes next in this sequence?
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$4, 15, 13, 7, 22, -1, 31, -9, 40, -17, 49$.
What comes next? The answer is $-25$, but why?
sequences-and-series pattern-recognition
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$4, 15, 13, 7, 22, -1, 31, -9, 40, -17, 49$.
What comes next? The answer is $-25$, but why?
sequences-and-series pattern-recognition
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stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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5
My answer is 42. The reason is that I like the number 42. And there is no one who can prove me wrong. That being said, if I were to try to read the mind of whoever made this problem, I would look at every other term.
– Arthur
1 hour ago
1
Any finite sequence of integers can be continued any way you like. Sometimes there are patterns that suggest that one continuation is more natural than another. I see no such pattern here. If you [edit' the question to tell us where the sequence comes from we may be able to hlep. Otherwise the question will probably be closed.
– Ethan Bolker
1 hour ago
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up vote
1
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up vote
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$4, 15, 13, 7, 22, -1, 31, -9, 40, -17, 49$.
What comes next? The answer is $-25$, but why?
sequences-and-series pattern-recognition
New contributor
stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$4, 15, 13, 7, 22, -1, 31, -9, 40, -17, 49$.
What comes next? The answer is $-25$, but why?
sequences-and-series pattern-recognition
sequences-and-series pattern-recognition
New contributor
stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 1 hour ago
stackofhay42
1133
1133
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stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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stackofhay42 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
5
My answer is 42. The reason is that I like the number 42. And there is no one who can prove me wrong. That being said, if I were to try to read the mind of whoever made this problem, I would look at every other term.
– Arthur
1 hour ago
1
Any finite sequence of integers can be continued any way you like. Sometimes there are patterns that suggest that one continuation is more natural than another. I see no such pattern here. If you [edit' the question to tell us where the sequence comes from we may be able to hlep. Otherwise the question will probably be closed.
– Ethan Bolker
1 hour ago
add a comment |
5
My answer is 42. The reason is that I like the number 42. And there is no one who can prove me wrong. That being said, if I were to try to read the mind of whoever made this problem, I would look at every other term.
– Arthur
1 hour ago
1
Any finite sequence of integers can be continued any way you like. Sometimes there are patterns that suggest that one continuation is more natural than another. I see no such pattern here. If you [edit' the question to tell us where the sequence comes from we may be able to hlep. Otherwise the question will probably be closed.
– Ethan Bolker
1 hour ago
5
5
My answer is 42. The reason is that I like the number 42. And there is no one who can prove me wrong. That being said, if I were to try to read the mind of whoever made this problem, I would look at every other term.
– Arthur
1 hour ago
My answer is 42. The reason is that I like the number 42. And there is no one who can prove me wrong. That being said, if I were to try to read the mind of whoever made this problem, I would look at every other term.
– Arthur
1 hour ago
1
1
Any finite sequence of integers can be continued any way you like. Sometimes there are patterns that suggest that one continuation is more natural than another. I see no such pattern here. If you [edit' the question to tell us where the sequence comes from we may be able to hlep. Otherwise the question will probably be closed.
– Ethan Bolker
1 hour ago
Any finite sequence of integers can be continued any way you like. Sometimes there are patterns that suggest that one continuation is more natural than another. I see no such pattern here. If you [edit' the question to tell us where the sequence comes from we may be able to hlep. Otherwise the question will probably be closed.
– Ethan Bolker
1 hour ago
add a comment |
2 Answers
2
active
oldest
votes
up vote
8
down vote
accepted
Break up the sequence into the even ordered terms and odd ordered.
2
Wow! I was looking for some very complicated patterns, and it is actually so easy.
– Mark
1 hour ago
add a comment |
up vote
2
down vote
- Firs observation, first term and second term add up to 19, third and fourth add to 20, fifth and sixth add to 21 and so on..
According to that, the the next number is $49+x = 24 implies x = -25$
- Second observation, second and third terms add to 28, the fourth and fifth add to 29 and so on...
Therefore, you can generate the next number using these two observations anywhere in the sequence.
I know this is not the best way to predict the next number. However, it is not a bad try.
:)
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
8
down vote
accepted
Break up the sequence into the even ordered terms and odd ordered.
2
Wow! I was looking for some very complicated patterns, and it is actually so easy.
– Mark
1 hour ago
add a comment |
up vote
8
down vote
accepted
Break up the sequence into the even ordered terms and odd ordered.
2
Wow! I was looking for some very complicated patterns, and it is actually so easy.
– Mark
1 hour ago
add a comment |
up vote
8
down vote
accepted
up vote
8
down vote
accepted
Break up the sequence into the even ordered terms and odd ordered.
Break up the sequence into the even ordered terms and odd ordered.
answered 1 hour ago
TurlocTheRed
70319
70319
2
Wow! I was looking for some very complicated patterns, and it is actually so easy.
– Mark
1 hour ago
add a comment |
2
Wow! I was looking for some very complicated patterns, and it is actually so easy.
– Mark
1 hour ago
2
2
Wow! I was looking for some very complicated patterns, and it is actually so easy.
– Mark
1 hour ago
Wow! I was looking for some very complicated patterns, and it is actually so easy.
– Mark
1 hour ago
add a comment |
up vote
2
down vote
- Firs observation, first term and second term add up to 19, third and fourth add to 20, fifth and sixth add to 21 and so on..
According to that, the the next number is $49+x = 24 implies x = -25$
- Second observation, second and third terms add to 28, the fourth and fifth add to 29 and so on...
Therefore, you can generate the next number using these two observations anywhere in the sequence.
I know this is not the best way to predict the next number. However, it is not a bad try.
:)
add a comment |
up vote
2
down vote
- Firs observation, first term and second term add up to 19, third and fourth add to 20, fifth and sixth add to 21 and so on..
According to that, the the next number is $49+x = 24 implies x = -25$
- Second observation, second and third terms add to 28, the fourth and fifth add to 29 and so on...
Therefore, you can generate the next number using these two observations anywhere in the sequence.
I know this is not the best way to predict the next number. However, it is not a bad try.
:)
add a comment |
up vote
2
down vote
up vote
2
down vote
- Firs observation, first term and second term add up to 19, third and fourth add to 20, fifth and sixth add to 21 and so on..
According to that, the the next number is $49+x = 24 implies x = -25$
- Second observation, second and third terms add to 28, the fourth and fifth add to 29 and so on...
Therefore, you can generate the next number using these two observations anywhere in the sequence.
I know this is not the best way to predict the next number. However, it is not a bad try.
:)
- Firs observation, first term and second term add up to 19, third and fourth add to 20, fifth and sixth add to 21 and so on..
According to that, the the next number is $49+x = 24 implies x = -25$
- Second observation, second and third terms add to 28, the fourth and fifth add to 29 and so on...
Therefore, you can generate the next number using these two observations anywhere in the sequence.
I know this is not the best way to predict the next number. However, it is not a bad try.
:)
edited 47 mins ago
answered 1 hour ago
Maged Saeed
517315
517315
add a comment |
add a comment |
stackofhay42 is a new contributor. Be nice, and check out our Code of Conduct.
stackofhay42 is a new contributor. Be nice, and check out our Code of Conduct.
stackofhay42 is a new contributor. Be nice, and check out our Code of Conduct.
stackofhay42 is a new contributor. Be nice, and check out our Code of Conduct.
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5
My answer is 42. The reason is that I like the number 42. And there is no one who can prove me wrong. That being said, if I were to try to read the mind of whoever made this problem, I would look at every other term.
– Arthur
1 hour ago
1
Any finite sequence of integers can be continued any way you like. Sometimes there are patterns that suggest that one continuation is more natural than another. I see no such pattern here. If you [edit' the question to tell us where the sequence comes from we may be able to hlep. Otherwise the question will probably be closed.
– Ethan Bolker
1 hour ago