Questions tagged [number-sequence]

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

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1
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3answers
208 views

speciality of the binary sequence $\underline{100101100110100}101101001$

One friend has given me this binary sequence and asked what is its speciality if we add next few terms to this sequence? The binary sequence was: $$\color{blue}{\underline{100101100110100}}101101001 \...
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2answers
304 views

Sequence of numbers 6

Fill in the correct number in this sequence: \begin{array} & 3 & 4 & 2^2 & 5 & 10 & 60 & ? \end{array} The options are So, apparently, the answer is either $6$ or $7$,...
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1answer
164 views

Number sequence puzzle stuck on

Stuck on this number sequence puzzle for a while now, today was talking about IQ tests with somebody so thought I'd ask here. 1, 2, 33, ?, 555, 23, ?, 222 The source is INRC 2018 Q3 (btw if anyone ...
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1answer
221 views

UNKNOWN CIPHER - NEED HELP DETERMINING (SOLVING)

I am trying to figure out how to decrypt and also re-encrypt potentially the following, meaning that i could write a random text string and it would generate that encryption and also decrypting it ...
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5answers
430 views

Haters will say 28 June

Find the next number in this sequence: $4,3,7,5,10,15,?$ Think outside the frustum here. Hint 1: Hint 2:
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2answers
334 views

A real-world puzzler - find the pattern!

This is a bit of an unusual puzzle - one that is purely "real world" :) My console can produce a load of colours. But I can't find any obvious way to relate the colour to its number. I'd hoped that ...
8
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5answers
665 views

The Legend of Four

As far as I know, all numbers have a root of 4. What I mean by this is as follows: Starting with any number, for example 384, I take the number of letters in that number. Then I repeat this process ...
2
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2answers
366 views

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?
3
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1answer
132 views

Mind the…(number seqeunce)

Find the next number in the sequence: 2, 3, 7, 23, 89, 113, ? Hint:
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2answers
254 views

A small set numerical puzzle

Three, Twenty-one, and forty-five start this list that has arrived. ---edit for a little more clarity--- Ninety-one and one hundred and twenty. Then we get to the doubly interesting number....
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1answer
668 views

Logic Puzzle: Solve and Provide Explanation [closed]

Please solve the logic puzzle above and provide an explanation for your reasoning.
5
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1answer
239 views

Find the next number in the sequence?

1 = 1 2 = 12 3 = 27 4 = 44 5 = 35 6 = ? The only hint I got was:
2
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1answer
288 views

Find the missing numbers 1, 3, 6, ?, ?, ?, 45, 55

1, 3, 6, ?, ?, ?, 45, 55 I asked the person who gave this to me and they assured me that it's correct. After an hour, I've given up :(
6
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2answers
404 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 ...
0
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1answer
47 views

Special rhombii

There are two parts to this puzzle, but I am posting the other part tagged with ‘mathematics’ because it isn’t really a number sequence problem. Part I Find the next number in the sequence: 1,2,3,7,16,...
3
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2answers
170 views

Cyrus' Adventure (Part 1)

Cyrus is on an adventure to the deep unknown forest, in order to get the mysterious treasure box. After walking for a few days, he found out that a strange door was blocking his way, and there weren't ...
2
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1answer
72 views

Ashley and MK, number sequence

What’s the next number in the sequence? $4, 6, 12, 18, 30, ?$ This one is pretty easy, so I will post the answer in a few days if no one gets it.
4
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1answer
188 views

Don’t be arbitrary

What’s the next number in the sequence? 2, 3, 2, 3, 2, 5, 2, 3, 2, 3, 10, ? P.S I’m new, so tell me if the question was too hard or too easy.
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1answer
62 views

Next number in the following sequence [closed]

1, 2, 3, 5, 8, 13, 21, and so on. Find the next digit.
2
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1answer
283 views

Find the next number in the series

Can you find the next number in the following series ? 2 , 0 , 3 , 5 , 25 , 119 , ?
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1answer
93 views

Number Sequence (hope it is not too hard)

Complete this number sequence 1, __ , 2 , 6, 120, 40320, 6227020800 , __ , 2.952328e+38, __ , __ , __ Can you do it?
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3answers
141 views

Finish the sequence (hopefully not too easy)

This is a number sequence. Can you guess the right answer? GOOD LUCK :) 0,1,2,4,14,21.... Can you guess the next 4 numbers?
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1answer
198 views

What is the next term of this sequence?

What is the next number? $$2,3,10,12,13,20,?$$
7
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1answer
257 views

Unlucky thirteen

These two separate sequences use the same rule and stop at the 13th term. 2, 1, 8, 5, 2, 5, 8, 6, 7, 9, 7, 7, 0 3, 1, 5, 3, 9, 2, 4, 3, 9, 7, 3, 1, 0 These examples are produced when the ...
8
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1answer
1k views

Staying grounded

I found a somewhat meaningful sequence that is not on OEIS yet, incredible! Here are the first 100 numbers of this sequence: ...
2
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1answer
3k views

Please find the missing number in the question [closed]

Find the missing number, and show how you found it.
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1answer
964 views

Next number in the sequence

Find the next three numbers of the number series : 0,0,3,20,115,?,? And please also tell the series this series is following
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1answer
91 views

solve it if you can [closed]

n = 11, j = 1, s = 9, m = ? If you solve it you are a genius.
28
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1answer
2k views

That gap is a bit jarring

... but there doesn't seem to be anything missing. $0,1,2,3,4,5,6,7,1527465$ What then could cause that rather large gap?
11
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2answers
626 views

A sequence of peculiar palindromes

My son Robin came up with this: 0550, 1001, 1111, 1221, 1331, 1441, 1551, 2002... What are the next 4 numbers? Solve it today!
2
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2answers
125 views

Number sequence 6

Fill in the correct number in this sequence: $16,32,40,88,92,172,?$ The options are: $178$,$176$,$174\frac{2}{3}$,$177$, and $175\frac{1}{3}$ At first, I thought the pattern was $2x+8$ but that ...
5
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1answer
633 views

The “Evan” Numbers

The Even numbers are simple: $2, 4, 6, 8, 10, 12, \dots$ The "Evan" numbers follow a tricky rule: $2, 4, 6, 30, 32, 34, 36, 40, 42, 44, 46, 50, 52, 54, 56, 60, 62, 64, 66, 2000, 2002, 2004, \dots$ ...
3
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0answers
296 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 ...
8
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1answer
159 views

Producing Integers

Came up with the idea for this one while I was scratching my head over another "what comes next" puzzle here on Puzzling.SE I wrote a small application which takes an integer and returns another ...
3
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2answers
146 views

Arrange 18 numbered cards in a special way

Given 18 cards with numbers 1 .. 9 on them (two cards with each digit), arrange them sequentially so that the distance between the identically marked cards is equal to the number written on the card. ...
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5answers
2k views

A tricky batch of four number sequences

What are the next few numbers in each of these integer sequences? Each of them has a clear and justifiable solution. 1, 2, 3, 5, 8, 9, 12, 20, 21, 22, ??, ??, ... 50, 49, 48, 46, 45, 44, 43, ...
2
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2answers
653 views

What is the next number in the given series?

I know that next number questions are not popular here, but this one is tough and I couldn't figure out the pattern. To give an idea one of the questions had a pattern of Prime(Fib(n)). So this is ...
9
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1answer
795 views

Calling all number sequence lovers!

What number follows in this sequence 93 1 855 45 593 500 241 ?
2
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1answer
3k views

Which number will replace the question mark

Here is a picture of a square. From the square, your task is to find out what number should replace the question mark and find a formula of it.
1
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0answers
43 views

Sequence puzzle in rows [duplicate]

The below is a number puzzle. It should be read left to right, top to bottom. Question 1: What is the next two rows of numbers? Question 2: How was this reached?
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6answers
2k views

Through which number we can remove the question mark?

I'm trying to solve this puzzle but so much confused and can't understand even.Please help me to solve this puzzle and also explain briefly.
0
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1answer
379 views

Number puzzle - Next number in the sequence

I did a puzzle that made me calculate the last number, and I couldn't figure it out so I looked at the answer, but still don't understand how I get to that answer. Number sequence is ...
10
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1answer
2k views

Which two numbers replaces the question mark?

I was solving some number puzzles. I am finding difficulty in solving this puzzle: which two numbers will replace the question marks? I need answer with explanation.
9
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1answer
307 views

Replace ? by number

This chain of numbers is making confused.Help to find the answer with explanation.
0
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4answers
328 views

What number should come next?

1 3 10 12 14 21 ◇ Identify ◇
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2answers
86 views

MATH PUZZLE ABOUT SEQUENCE [closed]

In the array of numbers below, each number above the bottom row is equal to three times the number immediately below it. What is the value of x+y? ...
0
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3answers
257 views

What number should be next? (hints added) [closed]

1 2 3 4 5 10 13 22 103 □ Identify □ one more number added due to OEIS hint 1 : hint 2 : hint 3 :
5
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2answers
202 views

Puzzle in a Newspaper

The newspaper I got this morning was a little off, to say the least. The main headline proudly read: Horse squeals eight times, dubbed "octsqueal" Well, I decided to ignore that, and head over ...
38
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2answers
3k views

It's my birthday

Just like last year, my age is a number you can score with one dart. The year before that, it wasn't, and it won't be next year. How old am I?
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3answers
2k views

FBI number riddle

A friend sent me this riddle and I can't figure out a solution: January = 251017 February = 25628 March = 81335 April = 12145 May = 251353 June = 51064 July = 251074 August = 20186 ...

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