Questions tagged [number-sequence]

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

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6
votes
1answer
205 views

An ad-hoc number sequence to solve

Inspired by another question here, I thought I might create my own: Fill in the correct number in this sequence: 5, 3, 4, 9, 8, 3, 5, ... And of course, explain why :)
3
votes
0answers
278 views

Number sequence 5

Fill in the correct number in this sequence: 5 3 8 9 1 27 ? The options are: 18, 54, 38, 14 or 13. I can see the pattern of 3, 9, 27 but other than that I am clueless. Source: a publicly available ...
4
votes
1answer
384 views

The triangle-sequence riddle

this is my number sequence: / - / - 1 - 2 - 7 - 6 - ? This riddle has somtething to do with equilateral triangles Good luck and have fun :) PS: please tell me if this is too broad, this is ...
-4
votes
1answer
128 views

The unthinkable sequence

To correctly answer this question, I would like you to include the next 5 numbers of this sequence and also tell me why they are the correct numbers. 3, 4, 8, 9, 14, 23, 25, 31, 36, ?, ?, ?, ?, ? I ...
6
votes
2answers
222 views

Number sequence solving strategies

Number sequences are one of the oldest puzzle categories in the book. You would find it hard to look through a days worth of puzzles posted here and to not find any puzzles that involve some sort of ...
9
votes
1answer
327 views

A game with numbered cards

Alice and Bob have each a number (not greater than 30) of cards numbered sequentially 1 onwards. Alice can easily reorder her cards and place them on a table one after the other so that no two cards ...
-2
votes
1answer
88 views

Complete the sequence if a specific pattern is followed [closed]

1, 4, 9, 18, 35, _ Find the next number if the occurence of numbers follows a specific order
1
vote
1answer
97 views

Can you help me out with this question? [closed]

I found that 3abc+a+b+c formula is correct first and second triangle. But the result for third triangle isn't in the options. Can you find another solution? Source: It's from an old job admission ...
19
votes
5answers
749 views

A riddle that has been killing me the whole day

So I'm walking around in London and found the following number riddle. The rules say, that what ever pattern you find, must be true for the rows as well as the columns. The answer in level 1 is for ...
3
votes
1answer
301 views

It's almost a cube

What is the next number in this sequence? 7, 10, 12, 19, 20, 30, _____ Note: I added another number as at first the pattern fit this too well. Hint 1:
0
votes
1answer
248 views

Find the next number in the series 7726, 635, 64, 9

Find the next number in the series. 7726, 635, 64, 9
4
votes
1answer
130 views

Length of the Sequence

There's a lot of number sequence based questions on this site. So I'm going to mix it up a little bit. This sequence will repeat eventually. You need to find how many numbers are in the sequence ...
2
votes
1answer
211 views

A Number Pattern Puzzle

I can't crack this one. Any help is appreciated,
6
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1answer
503 views

Last sequence puzzle on NSE stuck on

There's another puzzle on nse that I don't know how to do, and the only one besides my other question here. 91420512, 1297514, 35172115, ? Any answer would be ...
16
votes
5answers
1k views

Sequence puzzle

This is a sequence puzzle I found online which I'm stuck on: 452801, 773924, 102410, 471056, ? I figured out how to get from the first number to the second (+3, +2, +1, +1, +2, +3) for the digits, ...
1
vote
1answer
108 views

Number-sequence puzzle

Here's a number sequence puzzle on INSC-2017: 132, 2646, 2128128, ?, 8482124821221022.5 I managed to get some progress but don't know how to complete it (...
4
votes
2answers
591 views

The next number in sequence

We have following sequence: 12345, 33552, 45624, 66345, 73557, 45678, 66885, 78957, 99678 What will be the next number? Answer is known now (@JonMark Perry and @Mark found it). The answer is: ...
-5
votes
1answer
77 views

What is the pattern that describes these numbers? [closed]

Supposed you are given the following numbers: 6 28 496 8128 33550336 8589869056 What's the relation between them?
12
votes
5answers
355 views

Whic to erms bgn a f - l qu?

Whic to erms bgn a f - l qu? ...
3
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2answers
1k views

Which number is the odd one out?

Which one of the numbers below is the odd one out and why? 1, 2, 3, 4, 5, 8, 13 Hint:
1
vote
1answer
107 views

Find the next number in order [closed]

Find the next number in the sequence 9, 73, 241, 561, 1081, 1849,____
3
votes
7answers
631 views

ContinuE thE sequencE (+1)

Find the correct pattern and continue the following sequence 4, 3, 4, 7, 6, 5, 2, 6, 8, 7, 3, ... You should be able to find at least one hint in the title EDIT ...
1
vote
1answer
191 views

Which number comes next in the sequence?

Hopefully people will find this fun and not too easy. Which number comes next in the sequence? -,-,4,3,6,6,3,13,22,?
4
votes
2answers
329 views

What's the next number in this number sequence?

Find the next number in this sequence: 2, 4, 8, 13, 20, 29, 41, ? EXTENSION: Find the number for the nth term in the sequence (in terms of n). Hint:
0
votes
1answer
601 views

IQ test number sequence

I found this on an online iq test, and am stuck on it: 8442, ?, 20.50.50.5, 4114, 410.251 I have no idea what the dots mean here, I also googled the test and ...
0
votes
0answers
70 views

Another sequence iq puzzle pattern [duplicate]

Here's a sequence puzzle found online, I'm stuck on which I don't think I can figure out, any ideas? 1, 6, 5, 3, 4, 1, 2, 2, ?
-1
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2answers
101 views

Mr. Sloane's Tree

Mr. Sloane is a man that likes to draw trees with dots. Give him two dots and he'll draw you one tree, but give him three and he'll draw you no tree. How many trees can he draw with 6 dots? and with ...
0
votes
1answer
133 views

What is the pattern here for numbers

From an iq test online I have trouble doing the problem: 357, 1251, 152, ?, ?, 0 I tried a common trick to ignore the spaces and add commas elsewhere but it doesn't do anything. The answer is ...
3
votes
1answer
301 views

Another mathematical number sequence

Can you work out the mathematical rule for this number sequence? 354, 72, 345, 132, 6, 216, 9, 729, 354, 72, 345........ Hint 1 From time to time hints will be updated until solved. Note: this ...
0
votes
1answer
179 views

What number comes next?

3, 1, 4, 8, 8, 21, 21, 62, 128, 190, 430, 831, ? Find the number that comes next. Hint 1: Hint 2: as nikki pointed out my earlier sequence had some mistakes, this is the corrected sequence, i will ...
5
votes
1answer
65 views

Which number comes next?

This one should be easy. Easy as pie. Unless you think too hard. 9, 5, 3, 5, 6, 2, 9, 5, 1, 4, 1, ?
7
votes
2answers
179 views

Find the right triangle number

Here is my first try at a puzzle. Find the missing number. ...
-3
votes
2answers
161 views

Guess the number sequence #2

What's the next number in the sequence and what is the link? 1 | 5 | 10 | 25 | 50 | 100 | 200 | 500 | 1000 | 2000 | 5000 | ?
2
votes
1answer
110 views

Guess the number sequence #1

Find out the next number in the sequence. 2 - 6 - 39916800 - 6227020800 - 355687428096000 - ?
6
votes
3answers
210 views

What's the secret text?

Poem: The sequence leads you there The "shift" is not that rare It is ancient, you will see Jupiter is the key 14 15 92 65 35 89 79 ?? OGSULLOIOGRREYSGXZ Hint Big Hint
-2
votes
1answer
178 views

Are they buffalos? No, they're something slightly different [closed]

Given the numeric sequence: 344865 78930 136275 152340 Is the next number in the sequence: a) 82770 b) 340545 c) 271125 d) 75060 The title is, as always, a hint. Here's another: EDIT: Changed ...
1
vote
1answer
80 views

A second number sequence

I really have no clue how to solve this. I see no pattern at all. I treid difference, multiplication yet I see no pattern. Fill in the dots: 11 21 23 17 ... Possible answers: 11 3 9 1
3
votes
3answers
317 views

Sequence of numbers

I can not figure this sequence out. I have tried looking at the differences or differences of differences. Fill in the dots: 83 80 84 83 88 95 ... Choose one of the following answers: 87 95 91 83 ...
1
vote
1answer
203 views

Missing number in 5-cell grids

Find the missing number in these grids. I was unable to find any pattern. Choices: 9 6 8 4 source: Borhan Motevasete magazine, Oct. 2007
11
votes
1answer
2k views

I bet you can't find the next number in this sequence

Find the next number in this sequence. 9, 72, 16, 83, 33, 33, 36, 37, 32, 65, ?
0
votes
1answer
103 views

Another sequence of numbers [duplicate]

Here at Puzzling there are many sequences of numbers already. I come up with another one, that I haven't found so far. ...
5
votes
3answers
178 views

An Identifiably Very Uncomplex Puzzle

This is a relatively easy puzzle, but I thought I might share it anyhow. If 5 is 4, 6 is 9, and 7 is 5, what is 8? Hint 1: Hint 2:
3
votes
1answer
161 views

Historical Sequence

What is the next number in the sequence? 10, 5, 9, 7, 6, 5, 7, 5, 8, ? Hint 1: Hint 2:
0
votes
3answers
453 views

Obscure IQ test question

I stumbled upon this (probably simple) mathematical matrix I just couldn't solve. The problem is I came up with the answer 12 (which isn't one) and now I am so fixated on that that I am having ...
6
votes
1answer
362 views

What are the missing digits?

What are the missing digits? |3|2|2| |1|8|8| |?|2|8| |2|4|4| |9|2|2| |2|5|?| I was given this puzzle by a friend and I just can't see anyway to solve it...
7
votes
1answer
163 views

It's getting harder and harder for my friends to like me

What is the next number in this sequence? 2, 3, 6, 7, 9, 18, 25, 27, 54, 73, 97, 129, 171, 231, 313, 327, 649, 703, ... ? Hint 1 Hint 2 This is my first puzzle and I'm new to PSE, so feedback is ...
0
votes
3answers
266 views

What's the next number in the list?

What's the next number? 8, 20, 40, 68, 104, 122, 170, 226, 290, 362, 442 EDIT (since we already have some answers below which assumed the next number correctly) ... For the record, here are some ...
3
votes
3answers
163 views

What are the next two numbers in the sequence?

What are the next two numbers in the sequence? 0.5 / 0.5 / 1 / 0.5 / 2 / 1.5 / 0.5 / 0.5 / 1 / 0.5 / 2.5 / 2
4
votes
2answers
818 views

What are the rules here?

If you follow our rules, and you start with 1 and 5 then it goes into 1, 5, 1, 3, 1, 1, 1,... If you follow our rules, and you start with 14 and 2 then it goes into 14, 2, 10, 2, 6, 2, 2, 2,... ...
3
votes
2answers
239 views

How to play this game?

If we play the game with 7, 5, 3 and 2: 727272... If we play the game with 2 and 9: 292929... If we play the game with 9, 3 and 5: 953953953... If we play the game with 3, 9 and 5: ...