# 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.

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### Mind your P's & Q's

Here is a numbered sequence of words/phrases. Where should SESQUIPEDALIAN fit in this list? ZIPPER PEPPER MONEY SNIPPY PRIMED PIPPED SNAPPED POUND PUPPY PARADROPPED QUASI-POPULAR PEOPLE ... (sequence ...
• 27.1k
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### I’m cheering them on!

1: 3: 5: Can you determine what’s next? Clarification: In a comment I was asked if the [knowledge] tag should be added to this puzzle: Since no special knowledge is necessary to solve this puzzle,...
• 11.4k
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### Number salad with a meaning

617181419920141 128131119 1331152419 54141131811 Your goal is to explain what number sequence should come next and what it means.
• 357
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### Numerical sequence puzzle: 552175, 228496, 198479, 583317, 140554, 114383, 117045, ?,?

So here's the sequence, that I composed on my own. Think trees and 🟡 : 🟡 552175, 228496, 198479, 583317, 140554, 114419, 117046, ?, ?
1 vote
107 views

### Continuing the hexadecimal sequence 9bf66a6a87, 9bfd91c857, 9c0501e2ae, 9c0991af27, 9c0d27e6ec, [closed]

Given the following sequence of hexadecimals, figure out how to generate the next few in the sequence: 9bf66a6a87 9bfd91c857 9c0501e2ae 9c0991af27 9c0d27e6ec My ...
• 11
1 vote
154 views

### Quick find the unique answer, it may not be unique otherwise!

Replace the question mark with the correct 5-digit number. ...
• 35k
785 views

### 2,6,?,30,-270 number sequence

Got this number sequence puzzle from a friend.
105 views

### Numerical Sequence Puzzle: 8388607, 536870911, 2147483647,?

Sequence puzzle made by me. 8388607, 536870911, 2147483647, ?
166 views

### Two numerical sequences

Two numerical sequences made by me. Make sure to provide reasoning. 90,81,65,29,9,? 46656, 823543, 16777216, ?
210 views

A homemade number sequence puzzle. The sequence is as follows: 001, 1001, 00001, ?, 001001
2k views

### 4,4,2,6,2,10,4,_ sequence from 4th grade packet

The sequence (from my child's "for fun" challenge packet, not for credit or graded) is: 4,4,2,6,2,10,4,_ The possible answers are: A) 15 B) 20 C) 25 D) 28
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### The mystery of 107 numbers

Find the algorithm that was used to create the following sequence of numbers: BAH BAA BBA BAD BBD BAG BBG BAJ BBJ BBC BCC BBF BCF BBI BCI BCB BDB BCE BDE BCH BDH BDA BEA BDD BED BDG BEG BDJ BEJ BEC ...
• 1,153
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### Apple Sack Reconstruction [closed]

Apple Sack Reconstruction Puzzle Problem Statement: You have an apple tree that can produce apples of four colors: red, yellow, green, and blue. Imagine that you collect all these apples and place ...
• 5
925 views

### 2759, 4248, 1152,?

What comes next? 2759, 4248, 1152, ? What is the pattern? The op got it from this site: https://free.ultimaiq.net/nse.htm
688 views

### 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 = ?
520 views

### Sequence of 3x3 grids of dots

Has anyone got any ideas on how to go about solving this?
• 103
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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 ...
• 103
750 views

### Numbers turned into a number turned into numbers (start with the smallest)

What number should replace the question mark? Explain why. Hint 1
• 35k
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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 ...
323 views

### 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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### 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 ...
• 144k
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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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### 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-...
312 views

### 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
• 23
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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, ...
• 29
157 views

### 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.
1 vote
283 views

### 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.
• 317
847 views

### 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?
• 14.4k
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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, ...
305 views

### 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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### 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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### 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,...
• 3,674
1 vote
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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),...
258 views

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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.
• 6,561
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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?
• 6,012
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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: (...
• 23
142 views

### 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: $174$, $170{2\over3}$, $188$, $169{1\over3}$, $176$
1 vote
383 views

### 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 ...