Questions tagged [number-sequence]
A puzzle in which the hidden pattern behind a given sequence of numbers (and, often, the next term) is to be found. Use with [sequence]
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mathematical magic trick
Here’s a conversation that took place between two students.
A: Hey, want to see a magic trick?
B: Sure, how does it go?
A: Think of any number. Any nonnegative integer, I should say.
B: Okay.
A: ...
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Few enigmatic puzzles [closed]
?, 63264, 12825, 65121, 02420, 48409
REDYPS, Y = ?
8, 33, 5 : X, II, ?
Gods in space (7 letters) =
51151 = 8812,
22334 = 8459,
99111 = 2110910,
27772 = ?
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Numbers turned into a number turned into numbers (start with the smallest)
What number should replace the question mark? Explain why.
Hint 1
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Strings of Kind Numbers
A positive integer is said to be “kind" if it is divisible by one of its digits other than 1 (https://oeis.org/A185186). A kind string of numbers is a finite sequence of numbers all of whose ...
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Simple number sequence puzzle
Complete the sequence:
8, 6, 7, 3, 6, 5, 4, 5, 5, 2, ?
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List Roman numerals to minimize total distance
This is based on a discussion with @mousetail.
List the numbers from 1-100 in Roman numerals in the order that minimizes the total sum of the Levenshtein distances between consecutive numbers.
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Relation Between The Year And The Day
Today is January 22, the 22nd day of the year 2024.
I chose today because 22 is my favorite number.
Now for the problem. Try to relate 22 to 2024 using math.
For example, 58 is related to 271 because ...
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What is the earliest 2024 can appear in an S-sequence?
A Sloane Sequence (or S-sequence) is any sequence of different positive integers begining with 1 in which the nth term (after the first) is the previous term plus n, times n, minus n, or divided by n ...
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Arithmetic-progression-free sequences
This question Sudokus with no 3-term arithmetic progressions within made me wonder about the following question.
What is the longest sequence composed of the integers 1..N (or 0..N-1 if you have a ...
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icosahedral net [closed]
The net of $20$ triangles shown to the right can be folded to
form a regular icosahedron. Inside each of the triangular faces,
write a number from $1$ to $20$ with each number used exactly once.
Any ...
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answer
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Number sequence puzzle: strings of 0s and 1s
How can I solve this sequence?
011010, 100010, 100010, 100010, 000010, ?, 100010
https://free.ultimaiq.net/nse.htm
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What's the missing number related to primes?
I would like to draw your attention to this mathematical sequence related to prime numbers I've created and ask what the missing number is.
2, 5, 27, 182, 2310, 27200, ______, 8998400, 223092870, ...
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Two number sequence puzzles
123456, ?, 32407290, 128028806480
122540, 577697, ?, ?
Both puzzles are from - https://free.ultimaiq.net/nse.htm
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2
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Numeric progressive matrix: 2-7-5, 2-3-4, 10-21-?
This is an interesting question that I got from an IQ interview test. This can have multiple answers but need a good explanation.
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A very presentable number sequence
(The title holds a clue)
12,22,30,36,40,42,42,40…
Here is a finite sequence. Can you tell me the sum of all of its numbers?
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Find the pattern of the sequence of prime numbers 17 23 5 1013 2027 13
A friend gave me a sequence of prime numbers 17 23 5 1013 2027 13 and said that they have a pattern. I tried to find something but I am stumped by the fact that the numbers first increase, then kill, ...
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What are the next 3 terms: 19, 43, 59, ...?
What are the next 3 terms in the following finite sequence?
19, 43, 59, 23, 79, 83, 109, 463, 569, 263, ?, ?, ?
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A number sequence in disguise
What number should replace the question mark? Explain why.
...
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Numbers given: 2, 3, 6, 15, choice of answers: 24, 25, 36, 64? [closed]
Math question, numbers are
2.
3.
6.
15
Choice of answers given are
A.24
B.25
C.36
D.64
What is the correct choice please?
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Find the wrong number in the given series
I found this question in an Indian Highschool Reasoning Olympiad.
I tried looking for any relation using powers of 2 but failed.
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Find the correct pattern in this series
My uncle send me a puzzle, and neither of us can solve it. The series seems to have an obvious pattern, however the given answers do not include that pattern.
-2, 4, -6, 8, -10, 12, ..., ...
a) 39, ...
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A symmetrical number sequence
What 5-letter word does this sequence represent?
...
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Need help solving two number puzzles
1st Puzzle:
Can you find the next two numbers in the sequence: 122540, 577697, ?, ?
2nd Puzzle:
Solve this sequence: 28) 123456, 777, 154, ?, ?
Both questions are from https://free.ultimaiq.net/nse....
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What is next letter in sequence: B, D, G, J, L, ___?
My answer is P. But I am not sure as there is not sufficient data to support this.
B(2), ____, G(7), ____, L(12), _____ (alternating sequence of difference 5: 2, 7, 12, 17,...)
____, D(4), ____, J(10),...
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What is the next number in the following sequence: 0, 4, 8, 21, 52, 65, 96,?
What is the next number in the following sequence: 0, 4, 8, 21, 52, 65, 96, ?
To allow new users to solve this puzzle and earn reputation points, I encourage all users whose reputation is 200 or ...
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If 123x45 = 1, 22+222=0, 8979:4=5, 56319=2 what is 781-32=?
If 123x45 = 1, 22+222=0, 8979:4=5, 56319=2 what could be the solution to 781-32=?
Found it on an maths board and became desperate over time.
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A healthy number sequence
What should b the missing number?
1, 2, 3, 5, 6, 7, ?, 12
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1
answer
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What is the next term in the sequence 3, 1, -7, 41?
I could detect only one pattern, however, the sign is confusing me
$3 - 1 = 1 \times 2$
$1 - (-7) = 2 \times 2^2$
$-7 - 41 = -3 \times 2^4$
I have a pattern, but I am confused due the to sign.
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3
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Next term in sequence [closed]
Came across these 3 sequences to find the next number denoted by '?' in a test yesterday and was unable to select the right answer from the options given
1,6,19,54,151,426,? - Options given are 1415,...
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Can you find the missing letters?
A pattern of letters has had letters 10 through 20 deleted. Your job is to find out what letters should go in spots 10-20. Here is the pattern:
a, b, c, d, d, d, f, e, f, _, _, _, _, _, _, _, _, _, _, ...
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Find the ciphering method 2
Link to the entire series.
The message:
3, 53, 48751, 9247757, 294914580539
The answer is a 13 letter word: UNDERSTANDING
Hint 1:
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Self-referential sequence that is sometimes powers of two
I've created an integer sequence where, after the first two elements, every element is calculated using the previous two. If the first two numbers are $1$ and $3$, the sequence goes as follows:
$$1, 3,...
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Find next element of the sequence
Source of the question: Taken from the sub-Reddit r/askmath here: https://www.reddit.com/r/askmath/comments/15ar3ne/looking_for_the_answer_to_the_following_sequence/
What is the next element of the ...
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Puzzle Challenge: Unraveling the the Circular Conundrum
Known are five numbers: 1, 2, 3, 4, and 5, arranged clockwise. The number after 1 is 2, after 2 is 3, after 3 is 4, after 4 is 5, and after 5 is 1. Whenever two adjacent numbers meet, it triggers a ...
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4, 2, 4, 2305843009213693952, ? - an original number sequence
Here is the sequence:
4, 2, 4, 2305843009213693952, ?
Source: My brain (as it was invented by me. I also attempted to search if someone else created this, but I was unable to find)
Hint 1:
Hint 2: (...
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answer
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Find the next term in the sequence [closed]
What's the next term in the sequence?
$12$, $28$, $36$, $84$, $88$, $168$, $\ldots$
The possible choices are:
$174$, $170{2\over3}$, $188$, $169{1\over3}$, $176$
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If ABCDE*4 = EDCBA. A,B,C,D and E are all natural numbers ( 1-9) without repeating any natural number. Why is it deducible that E cannot be three?
If ABCDE*4 = EDCBA. ABCDE,EDCBA are five digit numbers. A,B,C,D and E are all natural numbers ( 1-9) without repeating any natural number. Why is it deducible that E cannot be three?
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The following sequence contains a 12 somewhere
Consider the following sequence:
11, 6, 11, 11, 6, 11, 11, 6, 11, 6, 6, 11, 6, 11, 11, ...
Although it looks like a sequence of 6s and 11s at first, it will in fact eventually contain a 12. Also, it ...
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Mathematical Codebreaking
I've created a number-sequence puzzle and dressed it up as a cipher puzzle.
The following message has been intercepted. You suspect it begins with the words ...
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Enclosed yet another sequence
There are so many sequences here already, I cannot guarantee that this is new. At least, I haven't found anything like this yet.
But I can assure you that you will not find the sequence on OEIS.
$$ 0, ...
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Why do 1 and 1 complete 120, 10, 3, ?,?
This is a question from an IQ test (NSE test designed by Ivan Ivec and Theodosis Prousalis). The link for this test is https://free.ultimaiq.net/nse.htm
The sequence is:
120, 10, 3, ?, ?
The answer ...
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Find the next digit in four given sequences
Find the next digit in each of these four sequences:
7 8 8 8 8 ...
3 4 5 2 5 ...
2 1 2 1 2 ...
1 1 9 6 3 ...
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Restore a once very happy sequence
Once, I had a nice sequence of numbers.. They were all very happy.
Suddenly, someone came by and stole all the lines. The numbers didn't know what to do, and got very scared. They clung to each other.
...
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Self-numbers and repunits
Self-numbers or Colombian numbers (A003052 in the OEIS) are natural numbers which are not the sum of a smaller number and the sum of its digits. Repunits (in base 10) are numbers consisting only of 1'...
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How is the RHS related to the LHS
Please explain the following relationship:
Accessible:
2 --> 18
20 --> 48
200 --> 6
2000 --> 26
How did I arrive at these?
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An interesting Number sequence: 8, 10, 7, ...? [closed]
Let's see how many of you can solve this correctly
I found a number sequence puzzle somewhere in the web with interesting logic and a unique strict solution.
8, 10, 7, 12, 5, 16, 3, ?
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1
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Continue the row of numbers: 1, 3, 9, 13, 65, ...?
Yesterday, I stumbled across a series of numbers that I could not solve. Maybe one of you can figure it out?
1, 3, 9, 13, 65, …?
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Find the next number in these series..?
1, 1, 1, 1, 2, 2, 2, 2, 2, 5, 4, ?
2, 4, 6, 10, 15, 26, ?
71, 194, 38, 1701, 89, 76, ?
5303944, 6677714, 2070936216988528558, ?
1, 2, 3, 6, 9, 9, 16, 20, 18, 30, ?
You know, there is more than ...
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Given the length of sequences with different seed values, what comes next? 1, 2, 4, 5, 11, 22, etc
Edit: Apparently this site has had a few too many what comes next puzzles without anything to go off of so I've decided to make this a different albeit a bit easier puzzle.
Sequences generated by a ...
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1, 2, 3, 10, ... Another find-the-next-number-in-the-sequence puzzle
Can you spot the pattern and continue the following sequence?
1, 2, 3, 10, 12, 16, 25, 37, 55, 81, 100, ...
Hints: