# Questions tagged [number-sequence]

A puzzle that asks for the pattern in a given number sequence.

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### Alphabet Number Matching

If : 888888 = T 777777 = O 555555 = Y 444444 = R then : 666666 = ? Basically you need to tell the logic along with ...
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### A sequence of integers

Here is my sequence (finite): 19,499,12991,337787,8782467,228344156,5936948059,154360649539. You just have to figure out its logic. Hint:
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### Finish The Pattern #2

Given a pattern: 0, 1, 2, 0.5, 2, 3, 5, 1, 2, 0, 2, 1, 4, 2, 3, $n$ Find the next item at $n$. Pattern/sequence explanation required
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### Finish The Pattern #1 [closed]

Given a pattern: 12, 22, 35, 68, 15, 28, 31, $n$ Find the next item at $n$. Pattern/sequence explanation required
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### A Sequence from a Sequence

This is a sequence that I made. I poured by blood and sweat into this! OK, no, it was more like orange juice and yogurt. It wasn't really all that hard, I guess. It might be tricky to figure out, ...
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### A Sequence of Sequences

Originally, this question was way too wide open. I have tried to clarify / narrow it down / restrict the possibilities. Let me know if it is still too wide open. These are some number sequences. I ...
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### Four rows of number sequences

Four rows of numbers: 1234567890 5916708234 192345678 ??? Fill in the last row with the appropriate digits (not necessarily 3, even though there are 3 '?'s). Please explain your answer. Hint/...
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### Petals around the rose

You roll 5 dice and I'll always be able to give a number uniquely-defined by the numbers on the dice. You have to figure out how it works, without looking it up. Here's a couple example rolls: 1,2,3,...
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### A benevolent but cumbersome batch of four sequence puzzles

Here are four more sequence puzzles. The challenge is to guess the pattern and hence fill in the missing terms. Each "???" denotes exactly one missing term. 6, ???, 5, 8, 4, ???, 7, 3, 4, ???, 4 (now ...
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### What Comes Next?

Which number comes next in the sequence? 2, 7, 19, 47, 83, ___ Please remember to explain your reasoning and put your answer and reasoning behind spoilers. (Do >! and then your text to put one)
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### What is the next number in sequence?

Consider the following sequence: 6211, 4214, 6321, 4135, 6359 What is the next number in that sequence? What are the rules of that sequence? I hope you'll enjoy my first question :) EDIT 1: ...
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### Explain the sequence in these Excel Fill Series

In Excel Fill Series if you input 23, 132, 2 then 31.33333333, 20.83333333, 10.33333333, -0.166666667, -10.66666667....is generated and if you input 13, 16, 17 then 19.33333, 21.33333, 23.33333, ...
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### Bitwise multiplication

Mr. EG has come up with a great coding scheme for (non-negative) integers in binary. To show off his creation, he demonstrates the following multiplications: ...
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### Solve the numeric sequence

I've thrown together some fun sequences to stretch your brains out! You can feel free to provide as many additional members of the sequence as you'd like, but mostly I'm looking to see if you can ...
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### Figure out this algorithm by analyzing the sequence of numbers generated

You are given a function f that, using an algorithm (that uses an old method), performs a calculation on four distinct values _ and generates a sequence of ten numbers. Now, your task is to figure ...
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### Fill the holes? [closed]

You have to fill the boxes to make the equation true:   +   +   = 30 Using only 1, 3, 5, 7, 9, 11, 13, 15. You can also repeat the numbers. (eg: 1 + 1 + 1) Edit1: the boxes of the equation are ...
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### Ancient machine in the desert… how does it generate its output?

I was walking through the desert and came across an ancient contraption of cogs and gears. It had a series of dials on one side that appeared to allow the input and output of numbers. On the other ...
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### Sorcery squares!

The following 5-by-5 squares of digits are not magic squares, but nevertheless they each have a crucial property which enabled me to generate them. What is that property? How could you generate more ...
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### What is the next term in the sequence?

The first term is f(0), the last term is f(2000): 0,0,0,0,1,0,1,0,2,1,1,0,2,0,1,1,3,0,2,0,2,1,1,0,3,1,1,2,2,0,2,0,4,1,1,1,3,0,1,1,5,0,2,0,2,2,1,0,4,1,2,1,2,0,3,1,5,1,1,0,3,0,1,2,6,1,2,0,2,1,2,0,4,0,1,...
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### Find the replacement for ?

624 --> 20 532 --> 117 634 --> 152 723 --> 40 443 --> 175 825 --> ? What should be filled in the last place so as to maintain the ...
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### A final batch of four sequence puzzles

This is my seventh (and probably last) batch of sequence puzzles that are nasty and hard to solve; I stress that each of them has a clear and justifiable solution. Sequence 1: RC, NU, RT, RS, PI, ...
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### From a math Professor, Bernard Budiansky

What is next in the sequence? 50, 42, 34, 28, 23, 18,14, ?
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### Yet another batch of four sequence puzzles

This is my sixth batch of sequence puzzles that are nasty and hard to solve; yet, each of them has a clear and justifiable solution. Sequence 1: Ca, Cl, ??, Er, ??, Po, Te, Th, ?? Sequence ...
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### Should the angels play their game?

Two angels in heaven want to play a game. One of them comes up with an arbitrary, computable function from the integers to the integers. The other angel has to guess what it is. The second angel can ...
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### One more batch of four sequence puzzles

This is my fifth batch of sequence puzzles that are nasty and hard to solve; yet, each of them has a clear and justifiable solution. Sequence 1: T?M, AOT?, ROT?, AN?, T?SB, ROT?, TFA Sequence ...
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### Find the missing number

What number should replace the ?
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### A batch of four sequence puzzles

This is my fourth batch of sequence puzzles that are nasty and hard to solve; yet, each of them has a clear and justifiable solution. Sequence 1: 2, ?, ?, ?, 0, 3, 7, 6, 4, 6, 9, 0, ?, 0, 4, 3, ...
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### What is the next number in the sequence?

What is the next number in the following sequence? 9999999, 4782969, 217728, 1568, ??? I saw this question in an app and I am stuck. Can you help me? Source: https://play.google.com/store/apps/...
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### Yet another group of five sequence puzzles

This is my third batch of sequence puzzles that are nasty and hard to solve; yet, each of them has a clear and justifiable solution. Sequence 1: 2, 4, 4, 3, ?, ?, 3, 4, 2, 4, 3, 4, 2, 2, 3, 4, 4,...
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### Five further sequence puzzles

This is my second batch of sequence puzzles that are nasty and hard to solve; yet, each of them has a clear and justifiable solution. Sequence 1: 18, 17, 18, 22, 26, 35, 32, 32, ??, 38, ??, 52, ?...
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### Five sequence puzzles

The following five sequence puzzles are quite nasty and hard to solve. Yet, each of them has a clear and justifiable solution. Sequence 1: ?, ?, ?, B, B, C, ?, ?, F, ?, S, M, A, S, P, S, C, A, .....
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### What is the next number in this sequence? 0, 1, 11.2, 10.2, 113.2, 103, 103.2, 0.2, 1.2, 2.2, 2, …

0, 1, 11.2, 10.2, 113.2, 103, 103.2, 0.2, 1.2, 2.2, 2, ? The only hint I'll give at this stage is that the sequence is infinite. If nobody gets it within a few days, I'll give a few terms that come ...
These numbers are created with a formula. Guess the formula for increment and calculate at least 3 next numbers of this sequence. increment is started with two given first $1$s. $1,$ $1,$ $2,$ ...