Questions tagged [number-sequence]

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

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3
votes
3answers
180 views

Missing numbers in triangular sequence

I am not sure if this is an appropriate puzzle for this site, but I searched and found 1 or 2 other types of puzzles like this. This is an original puzzle. Find the missing numbers in rows 8 through ...
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2answers
131 views

Find the missing term in 3×3 table

8 10 9 ? 15 28 7 12 13 Possible answers: A) 9 B) 10 C) 11 D) 12 Correct answer: Please explain how to solve this question? Source: NTSE stage 1 rajasthan ...
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1answer
62 views

Sequence represented by fruits

A person is confused about how a mathematical sequence works, to explain to her, her teacher does not use numbers and turns into sets of fruits. Which sequence is being represented by the teacher? a. ...
8
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1answer
212 views

$a_n = 2n^2, n \geq 1$ (modified)

The puzzle asks to determine the next term in the sequence 2, 4, 8, 0, 0, 16... a. 32 b. 18 c. 20 d. 24 e. 0 The obvious answer for me would be 32, with these zeros serving as the "neutral ...
2
votes
0answers
306 views

What's the next number in this sequence? 7, 30, 84, 81,? [closed]

I got this question in an online assessment for a job interview, and it's still puzzling me. This is the sequence: 7, 30, 84, 81, ? Possible answers are: -77, -93, 106, 73
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0answers
47 views

Continue the numeric sequence [duplicate]

Can you continue this sequence? If you can get the next few numbers in the sequence, you can just about as easily double the length of the sequence: 3 3 5 4 4 3 5 5 4 3 6 6 8 8 7 7 9 8 8 6 9 ... ...
2
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2answers
211 views

Number Sequence (yet again?)

This number sequence has numbers rounded to the nearest tenth. 1, 2, 4.5, ?, 26, ? Find the pattern and the answers to the question marks rounded to the nearest tenth.
4
votes
1answer
234 views

Numerical sequence - 11, 89, 17, ?, 47, 62, ?, 10, 0 [closed]

My friend from Math Stack Exchange gave me this sequence. He said that it isn't strictly a mathematical sequence, and that I need to find a pattern and then fill the question marks. These are the only ...
3
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1answer
218 views

Primes Number Sequence

Find the pattern in the sequence: 10 11 21 247 29 391 ? ? ?
3
votes
1answer
312 views

Math sequence. What number comes next?

I have created a pattern that is fairly interesting. It is discoverable from a geometric shape. The sequence begins: 1,2,4,9,1,18,1,2.... It is a repeating pattern. It could be an infinite repeating ...
7
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1answer
257 views

A rather odd number sequence!

Can you find the next number in this baffling sequence? 925, 955, 1040, 1140, 1255, 225, 410, ?
4
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1answer
162 views

What are the following numbers?

The number sequence goes like this: 3412, 361, 51, 5312, 5342, 531, ...... What are the following FOUR numbers in this sequence? Absolute hint: Hint 2:
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2answers
138 views

What is the missing digit in this 3x5 table?

The problem is as follows: The figure from below shows a sequence of numbers ordered in a tabular form. Find the next term labeled x. Transcription: 4, 3, 2, 5, 6 5, 6, 9, 2, 4 11, 9, 7, x, 14 The ...
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2answers
93 views

Two sequences with more than one logic

Find the missing terms in the sequences below 5, 7, 11, 15,...? A) 23 B) 28 C) 25 D) 19 10, 11, 19, 23, ?, 41... A) 24 B) 28 C) 31 D) 37 Interestingly, the exercise presents alternatives. I believe ...
9
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4answers
681 views

Find the next term of $\frac14,1,\frac94,2+\frac2{\sqrt{3}}, \frac{5}{2} + \frac{5}{2 \sqrt{2}}, 3 + 3 \sqrt{\frac{1}{10} (5 + \sqrt{5})}$

You are given the sequence: $$\frac{1}{4}, 1, \frac{9}{4}, 2 + \frac{2}{\sqrt{3}}, \frac{5}{2} + \frac{5}{2 \sqrt{2}}, 3 + 3 \sqrt{\frac{1}{10} (5 + \sqrt{5})}$$ Transcription: one fourth, then one, ...
0
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1answer
183 views

Roulette pattern

Mary was playing bingo when she noticed a logical sequence in the numbers of the balls as they came out. The numbers of the balls, in the order they came out, are shown below. 55, 52, 51, 48, 47 If ...
4
votes
2answers
105 views

Four sequences with similar pattern of beginning

Determine the missing number in the sequences below $7, 9, 13, 17, ?, 29,... \\ 6, 8, ?, 16, 24, 28,...$ $8, 11, 29, 51, 125, ?, 293,... \\ 9, 11, 30, 51, 126, ?, 294,...$ I apologize for the ...
2
votes
1answer
48 views

Sequence with sum of digits

What is the sum of the digits of the numbers $x$ and $y$ in the sequence $335, 333, x, y, 318, 307, 294, ...$? Source: Handbook of Codes and Sequences with Applications in Communication, Computing ...
6
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1answer
549 views

What does this geometric objects combinations mean?

You see combinations of geometric objects from a circle, a triangle, a square, a rectangle and a diamond and corresponding them numbers $4, 6, 19, 190, 1900$. Question Can you define the number for ...
-2
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1answer
183 views

A unique sequence solution [closed]

Let's have the sequence 127,191,255,319,383,... This sequence is formulated by adding the number 64 to the last term to obtain the new term e.g 127+64=191 and so on. There is another special way to ...
4
votes
1answer
133 views

Constant puzzle

A constant is hiding behind this puzzle, can you tell which? 4 $\rightarrow$ 2 $\rightarrow$ 1 $\rightarrow$ 1 $\rightarrow$ 1 $\rightarrow$ $\dots$ ? $\rightarrow$ ? $\rightarrow$ ? $\rightarrow$ $\...
1
vote
3answers
467 views

Online IQ test question - which number doesn't belong?

I took an online IQ test(www.free-iqtest.net) and encountered this problem which I wasn't able to do: I know that the answer is EIGHT but I do not know why the number 8 doesn't belong in the series. ...
0
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1answer
121 views

Number sequence question that apparently has two answers [closed]

I'm trying to solve a number sequence question that goes like this: 15, 14, 30, ? This question gave four options, 29, 28, 27, and 26. I think that 29 and 28 are both correct but this only accepts one ...
0
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1answer
122 views

What is a number sequence rule?

Let's say that we have a sequence of odd numbers $1, 3, 5, 7 ...$. From this sequence we build a spiral in the spirit of the Ulam spiral. Can you write down a rule for numbers change in the diagonal $...
8
votes
1answer
235 views

The mage's safe

After fighting hordes of undead, slaying several gargoyles and finally dispatching of the evil necromancer himself, the adventuring party finds itself in the treasure vault beneath the mage's tower. ...
8
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1answer
312 views

History function

Can you tell the next element of this history function? It is meant and important that mathematics tag isn't here! I save you the time to search on OEIS, you won't ...
1
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1answer
90 views

A meaningful sequence of numbers

The following sequence of numbers is related to a famous Conjecture. 17, 188, 94, 47, 518, 259, 37, 408, 204, 102, ? Could you find the next number in the sequence?
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0answers
88 views

NSE number sequence with 0s and 1s [closed]

I am not here to spam. I have been trying to solve this sequence but I cannot. This is from the NSE website: https://free.ultimaiq.net/nse.htm 011010, 100010, 100010, 100010, 000010, ?, 100010 I ...
5
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1answer
1k views

849, 352, 768, 493, 527 - Unusual number sequence problem

The sequence is: 849 352 768 493 527 This one has been puzzling me for days. I would appreciate any insight.
1
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1answer
94 views

119, 019, 609, 809, ?, 909 - A number sequence

This is probably very elementary for seasoned puzzlers yet I must request assistance with the following sequence: 119, 019, 609, 809, xxx, 909 What is the underlying principle here? Edit: Source: 2.2.,...
0
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1answer
199 views

Z1 = 1, Z2 = 36, Z3, Z4 = 38346, Z5 = 1246285 … Zn, find Z3 and Zn?

$Z_1 = 1, Z_2 = 36, Z_3=?, Z_4 = 38346, Z_5 = 1246285, ...$, find $Z_3$ and $Z_n$? For info I have already $Z_n$; I just want to compare the results. And if you want more value from this series I can ...
5
votes
3answers
336 views

A Collatz Conjecture for a Classic Conundrum

There is a famous puzzle that asks for the next line (and the rule) for the following pattern: 1 11 ...
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2answers
128 views

Mathematical sequence puzzle

Bob is trying to crack a puzzle. He finds this numerical sequence: 9056, 528, 64 What should he input after 64?
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0answers
186 views

The meaning of the related numbers

Question: What follows in the sequence below? 10233432943 As a hint, I must say I do not like the single 1 in it. It is unclear if the sequence even started with 1, but the 1 it needed. I had to ...
2
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0answers
53 views

Non-mathematical number sequence [duplicate]

Side question. I think I have never seen this sequence after my father posed the problem to me decennia ago. So apart from the solution, I would like to know if someone has seen it before. Note: Below ...
11
votes
1answer
328 views

Twenty Troubles

What does this list represent? 20 (e.g.) 20 (exactly) 20 (compared to 350) 20 (compared to 3) 20 (e.g.) 20 (when scored by the NY Giants in 1991) 20...21...22...23... 20 (when the last in this list) ...
0
votes
0answers
122 views

Formula for the sequence 1, 1, 1, 21, 3, 1, 4, 1, 5, 1, 6,

The sequence 1, 1, 1, 21, 3, 1, 4, 1, 5, 1, 6, ... appeared in one of my tutorial sheets in 2019. I assumed that the fourth term, 21, was a mistake (was supposed to be ..., 2, 1, ...) then it made ...
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0answers
131 views

A number sequence with a specific property

The following increasing number sequence follows a specific number property: 1 2 3 8 10 11 12 13 20 21 22 30 31 68 ... Find the property and the next two numbers
2
votes
1answer
123 views

Number Pattern Question

(Source: Asian Maths Olympiad 2015, Year 3) Given the first two circles, what's the answer in the blank space? I've tried using all basic operations but no pattern seems to work for all three. Any ...
2
votes
1answer
53 views

Completing a table of numbers

(This is a question from a basic IQ preparation test) What can be the next column if we consider the following table of numbers? 86 65 44 X 93 64 35 Y X=23, Y=06 X=26, Y=03 X=03, Y=26 X=06, Y=23
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1answer
69 views

What's the next number in the following number sequence?

The sequence is: 138, 29, 1, 382, 913, 8, X Possible answers: a) 9 b) 2 c) 3 d) 12 Note: This question is not mine and it was asked as an IQ question by a teacher.
1
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1answer
104 views

Sequences: terms before and after

Let's have the sequence 26,135,701,3640, What are the first two terms of this sequence and what number follows 3640?
5
votes
1answer
104 views

Fill in the missing number in this unique sequence puzzle

My friend Ed woke up this morning to find his website defaced. Upon the now altered web page, he found this number sequence: $237,\ 3566,\ 57069,\ \color{green}{???},\ 14600926,\ 233811181$ One of the ...
1
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1answer
103 views

Please complete this number sequence

(This is my original puzzle) Can you work out the number that fills in the question mark? 1,9,216,10000,?
1
vote
1answer
159 views

What number should be placed instead of the question mark?

There is a specific and common relationship between the numbers of each rectangular shape. What number should be placed instead of the question mark?
7
votes
1answer
211 views

Board of Important Numbers

I was visiting my cousin, a mystery writer and lover of puzzles, when I noticed this list of numbers on her white board. 13,814,070 26,818,110 86,811,060 18,819,190 10,914,190 33,915,010 36,912,211 ...
0
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0answers
39 views

Is it possible to create a bot for Kami [duplicate]

Not sure if this is the best place to ask this question (or game theory). There's a mobile game called Kami where you have to make the screen one color. The initial state is a series of different ...
7
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0answers
288 views

Sequence Puzzle - First Question of 42

Professor Tera was walking on Connecticut Road, where there are some public restrooms. Tera saw some students standing in a row. They seemed to be playing a game called Evolution. And it looked like ...
1
vote
1answer
131 views

Weird Sequences [closed]

Found this weird sequence: $$8110423, 259974, 9814143, 5512166, 113322, ?$$ The possible answers are: a) $334455$, b) $7911132$, c) $9841233$, d) $872236$. The correct answer is b), but I can't figure ...
5
votes
1answer
695 views

Formula One (?) Hard Puzzle

On a website I use to go, one of the writers gave this hard puzzle: What are the meaning of those numbers given they are not Norwegian coordinates. 60.6604211,10.7210713 I have no clue how to solve ...

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