Questions tagged [number-sequence]

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

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8
votes
2answers
494 views

Somebody hacked my clock

Harvey the hacker hacked my clock. At first, the results made no sense, but I eventually figured out his logic. ...
3
votes
3answers
699 views

Find the wrong number in the given series: 6, 12, 21, 36, 56, 81?

The following problem was given to me by one of my friend: Find the wrong number in the given series: $$6,\, 12,\, 21,\, 36,\, 56,\, 81 $$ ? A) $21\,$ B) $12\,$ C) $36\,$ D) $56$ and ...
0
votes
0answers
60 views

Find the missing number in the grid [closed]

Help! I'm trying to figure out this question and I can't do it. Am I brain dead?
2
votes
0answers
88 views

What should be the missing number? [closed]

What would be the missing number?
3
votes
0answers
92 views

How to find number of times sequence element $1$ is approached and from where?

Suppose i have sequence 1,-1,-1,-1,-1,-1 ........-1 .Now i start jumping from first sequence element (i.e 1 in this case) to next one .If i jump from 1 to -1 then element -1 will remain as it is.if i ...
8
votes
2answers
724 views

IX-NAY on the IX-SAY

Will this sequence ever have a 6 in it? 9, 1, 1, 1, 10, 3, 1, 1, 10, 5, 1, 1, 10, 1, 5, 2, 1, 1, 10, 1, 1, 1, 5, 4, 1, 1, 10, 3, 1, 1, 5, 1, 1, 1, 5, 2, 1, 1, 10, 5, 1, 1, 5, 3, 1, 1, 5, 4, 1, ... ...
2
votes
1answer
112 views

What is the missing item in this symbolic or numerical series/set?

Determine the missing item. I I I I V V V V XV XV XV XV XVI XVI XVIII XVIII XVIII XVIII XIX XIX XX XX XX XX ?
2
votes
3answers
109 views

IQ test sample patterns. Can anyone find the missing number? [closed]

I am fully hopeful that you can crack this puzzle. You need to answer with an explanation.
6
votes
1answer
104 views

Number sequence labyrinth

Can you find the way out of the labyrinth ? Rules: Each color you pass is a number (or character) sequence, you have to note the solution of this sequence. When you're out of the maze, your ...
-5
votes
1answer
97 views

Fibonacci again..Distinct Digits..Detail all your Deductive Steps [closed]

$ABB$ $CDE$ $GFB$ $DPGB$ $QPFR$ $RDFD$
0
votes
1answer
56 views

The missing number in a sequence [duplicate]

What is the missing number represented as "?" 10,11,12,13,14,15,16,17,20,22,24, ?,100,121,10000
2
votes
1answer
112 views

Deduce Distinct Digits of the Given Fibonacci Sequence- Detail all Steps

$DEPUS$ $SRST$ $UDQD$ $CTQU$ $DTPR$ $PQR$ $SDE$ $VRR$ $CVV$ $DUU$ $QP$ $TT$
0
votes
1answer
49 views

Puzzle on a blackboard [closed]

What is the missing number in the picture above?(question is from some puzzle game) I tried some approaches, but haven't found any meaningful rule..thanks in advance!
-3
votes
1answer
71 views

Strange? Primes and Palindromes have no business being in this Place?

$1$ $1$,$2$ Good easy start $1$,$2$,$4$ As expected $1$,$2$,$4$,$8$ I know it is going to be easy $1$,$2$,$4$,$8$,$16$ why is he giving this? I got it! $1$,$2$,$4$,$8$,$16$,Prime ...oops!.....
5
votes
2answers
108 views

Mathematical Series

I was just going through some series and came across one which I wasn’t able to solve. The first 8 numbers of the series are: 1,3,7,19,53,153,449,1331,... Can anyone tell me a mathematical formula ...
3
votes
1answer
208 views

The Mathematical Puzzle That Is So Mathematical It Will Blow Mathematical Minds Of Mathematics Away!

Here is a short sequence that I made when brainstorming puzzles: 19 101 920 20009 701 104 403 311 3000000000000000003 ... You need to figure the ...
4
votes
1answer
107 views

Deduce the Missing Terms in the Sequence

$NINE$ + $5$ $EIGHT$ + $3$ $SEVEN$ + $2$ $???$ + $?$ $FIVE$ + $1$ $????$ + $?$ $?????$ -$?$ $???$ - $?$
-6
votes
1answer
69 views

Give these Digits their own Place..Place them Right

In their own Circle. Such that the arrows point to successive numbers . Start with 1 and end with 9. There might be more arrows than necessary. Find the solution with least number of arrows ignored.
-1
votes
1answer
61 views

Complete my number sequence

Can you complete following number sequence ? 389919, 1308, 93, ?, ? Hint:
5
votes
2answers
710 views

Number sequence: 202500, 5184, 32400, 12960,?

Can you solve my first selfmade number sequence ? 202500, 5184, 32400, 12960, ? Hint: Hint: Hint
3
votes
1answer
85 views

Another cool number-sequence puzzle

The task is to find x. (Source https://free.ultimaiq.net/nse.htm) 123456, x , 93332736, 3359978496
5
votes
1answer
422 views

NSE Numerical IQ Test no.12: 759802, 358829, 847123,?

This is a question from the NSE Numerical IQ Test by Theodosis Prousalis and Ivan Ivec: 12) 759802, 358829, 847123, ? After 2 hours, I can't figure out the answer. I've only made these ...
1
vote
1answer
179 views

What is the missing number in set B?

A {6, 2, 2, 2, 16, 2} B {37, 37, 3, 3, 3, ?} The numbers in set A relate to one another through a numerical or abstract pattern. Set B has a similar or a somewhat contrasting pattern .The task in ...
4
votes
1answer
153 views

Prime Knight travels through Prime Country

Prime Knight travels through Prime Country... Ride along and Document Details of his Journey As this Prime Knight (only chess move allowed) journeys through Prime land, he makes a pit stop at every ...
-4
votes
1answer
110 views

Prime Sequence…a little bit Unusual about the Missing Members

What are the Missing Members in this Prime Series? what is the Significance of this Sequence? $19$, $17$, $13$, $?$, $?$, $3$, $2$
4
votes
1answer
147 views

Fill.in the two missing terms in this Simple Sequence

What are the two missing numbers in the sequence shown below: $$\def\S{\phantom{XX}} \large\begin{array}{|c|c|c|c|c|c|}\hline \S&\S&\S&\S&\S&\S\\[-10px] 4 & 5 & 6 & 7 &...
4
votes
3answers
235 views

What are the missing members in this sequence based on the digits 0 to 9?

Find the missing members? 0, 0, 2, 0, 2, 3, 0, ?, ?, ? Hint 1
5
votes
3answers
197 views

Find the Missing Members of this Powered Sequence

There are 4 missing members in this small series...labeled ???. Hint 1; Hint 2: Complete the series. $191$, $426$, $931$, $???$, $???$, $646$, $971$, $???$, $???$
1
vote
1answer
168 views

Find the missing number in the matrix [closed]

Find the missing number, $x$, in the following matrix $$\begin{matrix} 16 & 13 & 9\\ 11 & 8 & 6\\ 9 & 7 & x \end{matrix}$$
3
votes
1answer
413 views

Who are the Missing Members of this Noble Family?

Could you please find the Missing Nobles? $118$, $?$, $54$, $?$, $18$, $10$, $?$
2
votes
1answer
218 views

Mathematical Sequence Based on Prime Numbers

This sequence is based on prime numbers Hint 1: 16, 17, 11, 16, 10, 8, 13, 7, 14, 8, 11, 7, 5, 10, 4, 11, 5, 10, ?, ?, ? What are the final three numbers?
-2
votes
1answer
171 views

What is the next item in the following sequence?

11111111, 333333, 5555, 77, ? Find the most complete and simplest solution that fits.
-2
votes
1answer
147 views

What is next: 2, 3, 5, 13, 89, 233, …? [closed]

Based on what is shown, what is the next number in the sequence?
3
votes
1answer
138 views

Another Number Sequence…Yayy!

Find the next terms and also, explain the logic used for the terms of the sequence. $3,7,11,15,20,27,?????$ Hint : Autobots, This is Optimus Prime.
14
votes
1answer
328 views

What's up with my calculator?

As I am wont to do, I got a new calculator the other day. Obviously it needed a few test calculations: 5 + 6 = 11 22 - 17 = 5 10 + 3 = 13 4 * 6 = 24 OK, so ...
0
votes
1answer
194 views

Number Sequence Series-Question 8

This is a series of questions that are created by me. Here is question 8: (36),(45),?,(17),(50),?,(29) I will give a hint to you guys if I feel it is necessary. $$$$ You can check other unsolved ...
-4
votes
1answer
128 views

Simple Rule Generates this Sequence from Well Known Number Series

First 6 terms generated on applying the simple rule are displayed here. 5, 8, 18, 102, 322, 1830, ?, ?, ? Hint 1: Hint 2: Hint 3:
3
votes
0answers
587 views

Number Sequence Series-Question 7

This is a series of questions that are created by me. Here is question 7: (23),(55),(155),(1255),?,?,(56139611) I will give a hint to you guys in one month if nobody can solve it.
3
votes
1answer
220 views

Happy New Year?

Extend this infinite series by five more terms: 17, 3, 5, 7, 11, 17, 2, 3, 5, 11, 13, 17, 2, 5, 7, 11, 13, 2
12
votes
1answer
385 views

Infinite Sequence based on Simple Rule

Using one simple rule, an Infinite Sequence has been developed. First 30 terms are given. Can you continue the sequence for at least next Ten Terms? Series continues from top left to bottom right. $...
0
votes
2answers
135 views

Do you know what's next?

'Predict' the next few (5 or 6) terms of this series. 1, 1, 1, 2, 3, 6, 7, 10, 11, 12, 17, ...? Hint: Who is the 'prime' suspect in this mystery sequence?
1
vote
0answers
144 views

Sequence of close numbers

I just came up with the following sequence of numbers. 25 26 27 28 30 30 ... They all seem to be very close to one another... but what is the next number in the sequence? And what is the principle ...
6
votes
1answer
115 views

A very basic number sequence puzzle

Predict the next members of the sequence below and explain what the relationship is. 2, 10, 101, 1211, 14321, ...
8
votes
1answer
339 views

Number sequence puzzle; 2, 10, 44 (+2 hints)

Predict the next three members of the sequence below and explain what the relationship is. 2, 10, 44, 1012, 248, This number sequence does not appear in the Online Encyclopedia of Integer ...
4
votes
1answer
179 views

Finding a lost friend in a haunted mansion

Whilst staying in a large haunted mansion, Mervin had carelessly lost his friend Debs. She was nowhere to be found, and wasn't answering his calls. Instead of finding her, he discovered this ...
5
votes
1answer
118 views

Number Sequence Series-Question 6

This a series of questions that are created by myself. Since question 6 is not that difficult I will not give any hint to you guys. Enjoy the test. Here is question 6: 2,6,8,7,5,3,? $$$$ If you ...
3
votes
1answer
97 views

Number Sequence Series-Question 5

This a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is question 5: 342,765,?,242325 (It ...
0
votes
1answer
114 views

Fill the grid- 4.0

Grid again !!! Can you find what comes in place of '?' ? HINT 1 HINT 2 HINT 3 In text: 5234 2112 06?7 0964 Also Try: Fill The grid - 3.0 Fill the grid - 2....
2
votes
3answers
84 views

Number Sequence Series-Question 4

I want to share a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days if nobody could answer my question. Previous ones are here: Number Sequence ...
2
votes
1answer
143 views

Number Sequence Series-Question 3

I want to share a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is my number sequence: 2020,...