Questions tagged [sequence]
A puzzle about a series or collection of symbols, elements, or other objects, whose chosen ordering obeys a specific logical rule, which is usually to be determined.
298
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Minimum number of flips needed to fully set a binary string
Source: My school teacher, it was just given as a problem statement.
Problem: You are given a binary sequence $S$ of up to $10^6$ bits. You wish to set all the bits in the string to $1$, but the catch ...
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Lucas's interesting cipher
Lucas was fooling around with some letters when he encoded some text into Gsobj lwmtkd sbceugb vfy rgdjb.. Can you figure out the original text he had?
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1
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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 = ?
4
votes
2
answers
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Sequence of 3x3 grids of dots
Has anyone got any ideas on how to go about solving this?
4
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1
answer
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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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1
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Almighty threats!
There's rhyme and reason behind the following 10-step sequence of words and phrases:
1. HUSK
2. BE COMELY
3. TRACKED
4. NOT HOOK
5. KICK TIPS
6. CUSP
7. ALMIGHTY
8. THREATS
9. BEFIT
10. ?
The name ...
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2
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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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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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0
answers
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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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0
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Find another way to prove the answer: circles with four numbers in them [closed]
I know of an alternate solution to 3 where trying to find it would make an interesting puzzle. Can anyone do so?
It has to involve a sequence somehow.
Source: https://www.indiabix.com/puzzles/number-...
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1
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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1
answer
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Sequence of triangles divided into 10 smaller triangles with yellow, purple, and/or dots [closed]
This is IQ type of puzzle. May not be progressive sequence.
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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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1
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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, ...
9
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none, none, Newland, Portage, Plano
What is the pattern behind this list of US cities? Really quite simple for US folk, and I think most educated foreigners have the requisite background info.
US City
US State
Añasco
PR
Carolina
PR
...
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2
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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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1
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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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1
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Can One Solve This Scary Sequence?
The following terms appear in a sequence. Unfortunately, they are scrambled (both the original terms and their order).
Theory, Policeman?, Contest, Clarice, Bad Act, One in Rome, Fashionable, Confess,...
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REALLY important days in history
@Z. Dailey asks a mathematical puzzle Important days in history... and to come! with a series of dates in years 1973, 1978, 1983, 1992, 2005.
My puzzle asks the question: What is the previous date in ...
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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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E Rebus Unum – a picture sequence puzzle
This is part 42 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
Today I have been taking it easy. You might even say it has been a walk in the ...
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Longest Fibonacci word
Fibonacci words are defined as $F_0 = a, F_1 = b, F_{n+2} = F_nF_{n+1}$ where $a, b$ are letters. How can you find the longest Fibonacci sub-word in a given string?
Try to solve it in linear time ($O(...
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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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Continue the squence of hexagons
This is from c't, a German IT magazine (link will download file). You see seven hexagons, each with seven green and blue dots, following a specific rule. Find out what colors the circles must have to ...
5
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2
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please Extend this list of Units
Given the following list of four corresponding series of numbers, what would the fifth line look like?
1 : 1.4 / 3
2 : 3 / 2 | 1 : 2 / 6
2 : 3 / 2
1 : 2 / 3
Hint 1: This puzzle was inspired by the ...
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1
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499
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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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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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0
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The Mono-Quantum Condrum
You are presented with a locked box, and on its surface, you notice a sequence of peculiar symbols:
⌬ ⌅ ⊙ ⊡
Next to the symbols, there's an inscription:
...
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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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Explain: 5-1=1, 5+1=1, 5=1
Explain the following equations. The final answer is 1 word.
$4 ÷ 7 - 1 = 0\\
1 \times 12 + 8 = 2\\
0 ÷ 10 + 7 = 0\\
9 \times 2 - 3 = 1\\
5 - 1 = 1\\
4 - 2 = 1\\
2 \times 2 - 9 = 1\\
5 = 1\\
5 + 1 = ...
3
votes
1
answer
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Next number in the sequence 2, 4, 3, 10, 5, 5, 28, 11
2, 4, 3, 10, 5, 5, 28, 11, 7, 8, 82, 29, ?
What is the next term in this sequence?
I was asked this in an interview, but my time ran out and I couldn't figure out the pattern. I see a lot of terms of ...
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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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What should we put in the 6th box?
Below there is a small sequence. What should we put in the 6th box?
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NSE puzzle: 91420512, 1297514, 35172115,?
There's another puzzle on nse that I don't know how to do.
91420512, 1297514, 35172115, ?
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What is the next short word in this long sequence?
Which one of the four answers fits the word sequence below and why?
Am
As
On
An
Or
Or
On
?
Four choices: 1. At 2. Or 3. Law 4. Over
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Another Number Sequence Riddle
Here is another number sequence riddle for you all:
4, 2, 7, 6, 8, __, __, and so on. What numbers go in the blanks?
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1
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Can you find the next number in the following series? 14, 1, 13, 0, 23, 21,?
Replace the question mark with the next number:
14, 1, 13, 0, 23, 21, ?
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1
answer
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Circle, circle + triangle, ... sequence of groups of colored shapes:
Source: https://ravens-2-progressive-matrices-clinical-edition.netlify.app/
I can't seem to find a logical consistency for the answers. What is the correct answer?
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What comes next in this sequence? Choose from 4 options
What comes next in this sequence? Why? Choose from the 4 options.
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1
answer
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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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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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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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What's the next number? You may need some help
What's the next number in the following sequence?
1, 3, 6, 7, 9, 11, 13, 14, 18, 21, 23, 28, 31, ___, ...
Hints will be released gradually - the first one is in the title.
Hint #2:
Additionally:
...
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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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1
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What is the sequence?
The following 5 sequences of base-10 numbers all follow the same pattern, and converge at 14,.
What is the pattern and which number is next?
1,5,10,14,23,...
2,6,10,14,23,...
3,9,14,23,...
4,9,14,23,.....
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1
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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A *special* sequence of dots and lines (from first to last)
What you see here is a complete sequence of dots and lines. Can you tell me what this sequence represents?
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1
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Form the English alphabet using thirteen people
Thirteen well known people (some of them alive and some of them deceased) are numbered from 1 to 13.
Instead of revealing who they are, the following clues are provided:
An Italian football player.
...
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1
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This won't work with US states
This puzzle is part of the Monthly Topic Challenge #12: mobile-friendly puzzles.
For each of the following sequences, identify the three missing terms (marked by '???'):
Nitrogen, Fluorine, Argon, ...