# 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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### Number Sequence: 1, 1, 2, 4, 3, 9, 4, 61, ...?

Forgive me for the unoriginal title, it's been a while since I made a puzzle. Just a simple number sequence, find X and give reasoning/pattern 1, 1, 2, 4, 3, 9, 4, 61, 5, 52, 6, 63, 7, 94, 8, X ...
75 views

### Number sequence puzzle: 14, 32, 69, 05,?

I made this puzzle on my own, feel free to solve it. Sequence is as follows: 14, 32, 69, 05, ?
1k views

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

Here is a numbered sequence of words/phrases. Where should SESQUIPEDALIAN (or the title) fit in this list? ZIPPER PEPPER MONEY SNIPPY PRIMED PIPPED SNAPPED POUND PUPPY PARADROPPED QUASI-POPULAR ...
149 views

### Numerical sequence 942, 138, 424,?

Homemade number sequence puzzle, quite easy. Sequence: 942, 138, 424, ?
183 views

### What's the image it all started with?

Below is a small sequence, showing every element, except the first. What is the image it all started with? text version: , ,r,r,r, , , ,g,g,g, , ,r, , , ,r, ,g,r,r,r,g, , ,g,g,g, , ,r, , , ,r, ,g,r,...
538 views

### Sequence of 3x3 grids of dots

Has anyone got any ideas on how to go about solving this?
432 views

### 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,...
295 views

### Number salad with a meaning

617181419920141 128131119 1331152419 54141131811 Your goal is to explain what number sequence should come next and what it means.
254 views

### 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, ?, ?
111 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 ...
1k views

### Sequences on an IQ Test

I found this IQ test (http://free.ultimaiq.net/nse.htm) and can't seem to solve questions 18 and 19: Q18: 120, 10, 3, ?, ? Q19: 41, 23, 61, ?
838 views

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

Got this number sequence puzzle from a friend.
115 views

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

Sequence puzzle made by me. 8388607, 536870911, 2147483647, ?
1 vote
171 views

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

Replace the question mark with the correct 5-digit number. ...
218 views

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

### Two numerical sequences

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

### 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 ...
124 views

### 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 ...
1k views

### 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:
937 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
915 views

### 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 ...
328 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?
690 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 = ?
754 views

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

What number should replace the question mark? Explain why. Hint 1
203 views

### 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 ...
542 views

### 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 ...
644 views

### 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 ...
958 views

### 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 ...
310 views

### 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, ...
127 views

### 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-...
319 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
161 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
303 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.
532 views

### 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, ...
487 views

### 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 ...
849 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?
307 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, ?, ?, ?
2k views

### 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,...
2k views

### 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 ...
1 vote
2k views

### 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),...