Questions tagged [number-sequence]

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

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9
votes
1answer
110 views

One Step Forward, Two Steps Back

What is the next number in this never-ending sequence? 0 1 1 110 111 101 11000 11101 10101 1100110 1001011 ...
4
votes
1answer
117 views

Find the formula and the missing number in the series

Given the series below, can you find its formula and hence the missing number? 3, -1, 7, 8, 20, 35, 43, 76, ??, 131, 159
0
votes
0answers
105 views

Ten Sequences With a Theme

Each of the ten sequences below have a similarly worded rule that determines the next number in the sequence. Try to figure the rules and subsequent numbers for each of the sequences. They are not ...
12
votes
1answer
106 views

Counting with towers

An ancient civilization has been discovered which uses an unusual counting system, based on stacks of blocks. However, most of the information on this civilization has been lost to time, and little ...
-1
votes
0answers
76 views

Obtaining three equal factors from a given number [closed]

Lets have two sequences. S1 12, 45, 171, 648, 2457, 9315, 35316 and S2 21, 81, 306, 1161, 4401, 16686, 63261 The ratio of the last two terms $\dfrac{63261}{35316}$ is almost equal to $\sqrt[3]{...
10
votes
2answers
393 views

Find the next number in the sequence: [12, 13], 25, 58, 52, 98, 108, 780, 568, 306

Given this sequence: [12, 13], 25, 58, 52, 98, 108, 780, 568, 306 What is the next number? Note the square brackets. Hint: Hint #2: Hint #3: Hint #4
8
votes
1answer
421 views

Find the next number and what I am!

This is the first puzzle I made and apparently it's too difficult. So I tried to create hints, but it's hard. If you have any ideas on how to write this riddle in a better way, or have more "...
-1
votes
1answer
75 views

Formulating sequences in particular ways

Let's have the following sequences: 772,6772,59404,521092,? 298,2614,22930,201142,? What comes next, where the question marks are?
-1
votes
1answer
104 views

My favourite two number sequences are below do you know/ can you guess them and what are yours? [duplicate]

3.3.5.4.4.3.5.5.4.3.6.6... and 8, 5, 4, 9, 1, 7, 6, 3, 2, 0
16
votes
2answers
1k views

A geometric sequence using one digit

Give the first few terms of a geometric[1] sequence such that: the sequence is increasing and infinite only one digit is used throughout the sequence the terms are written as base ten ...
-3
votes
1answer
130 views

Number puzzle! Find “?”

Replace the question marks. 1, 1, 2, 3, 6, 7, ?, 11, 14, 19, 20, ?
-4
votes
1answer
220 views

What’s the next number in the sequence?

I have a numeric sequence: 1,4,5,5,7,9,9,6,6,11,13,11,? What is the next number in the sequence and what pattern does the sequence follow? This sequence has to do with prime numbers and the sequence ...
8
votes
3answers
1k views

What comes next in this sequence, and why?

I'm having the hardest time with this sequence puzzle. The mobile game I play (which asked me the question) doesn't provide answers or explanations for incorrect answers, and I'm searching online so I ...
3
votes
1answer
128 views

Replace “?” in a squence of numbers

Replace the "?" in the following sequence:$ $ 2 7 10 13 14 22 26 27 28 31 49 53 54 57 78 79 ? 90 101 106 109 110 111
2
votes
1answer
136 views

Placing three sets of cards Ace to 9 in a row

From an ordinary deck of playing cards remove cards ace to nine of any three suits (27 cards in all), and place them in a row so that between any 2 consecutive aces there is precisely 1 card, between ...
10
votes
5answers
2k views

Aces, twos, threes, and fours in a row

Take the 4 aces, 4 twos, 4 threes, and 4 fours from an ordinary deck of playing cards. Is it possible to place all 16 cards in a row on a table so that there is precisely 1 card between any 2 ...
4
votes
2answers
272 views

Number sequence. What's next?

Replace the question mark. Ill give hint if noone can solve it within a couple of hours. 5, 12, 24, 36, 52, 68, 84, 100, ?
3
votes
1answer
80 views

What number should be replaced by? How and Why

What number should replace the ? (1,3),(6,8),(6,9),(7,3),(2,4),(6,4),(?,6),(7,2)
2
votes
1answer
134 views

Number sequence. Replace the “?'s”

Replace the question marks. 6, 35, 143, ?, ?, 1147
1
vote
1answer
118 views

Replace the question marks

Here's some number problems. 8:2::1:1::64:? A:4::D:49::?:169 439: SQUARE::125:CUBE::216:? A:8::M:5::J:1::O:10::M:?
7
votes
1answer
875 views

Triangle puzzle

Can you guess the pattern? Fill in the blank for the last triangle
4
votes
1answer
256 views

What does “?” stand for?

As stated in the title, what does the "?" stand for? If you want me to clarify something or if you want additional information, let me know. But this should be sufficient. -30 04 50 = 16 -10 16 40 =...
4
votes
2answers
452 views

What is next number in the sequence?

11, 12, 26, 615, 153X, ? Just to clarify, the "X" stands for a single digit and the "?" stands for the next number in the sequence.
-5
votes
1answer
155 views

A number sequence: 3, 26, 83,

Genius level! 3, 26, 83, 1196, 2915, ?
0
votes
2answers
165 views

Can you find the missing number?

Here's 3 number puzzles/series. I'll give hints tomorrow if noone is able to solve them 11, 31, 71, 91, 32, ? 1, 1, 2, 6, 36, 44, ? IF, 132 = 72 208= 200 390=288 ...
0
votes
1answer
115 views

Can someone tell me what is next in that 3 sequences?

I'm looking at three sequences from the test at http://free.ultimaiq.net/nse.htm. I managed to answer 27 of the 30 questions, but I'm really curious about the other three. Q6: 1001, 4524, 4299, 3984, ...
3
votes
3answers
219 views

Find the missing number in the given puzzle

Original image here Source: My coaching DPP (Daily Practice Paper) A) $112$ B) $92$ C) $82$ D) $102$ I found $5^2+3^2-4^2=18,\,7^2+5^2-3^2=65.$ So, $?=8^2+6^2-5^2=75$ which is not in option. ...
1
vote
1answer
133 views

How do I solve this number sequence puzzle?

I am trying to answer this number sequence puzzle - which of the five potential answers is correct, and why? http://www.admissions.yildiz.edu.tr/images/files/ytuyos2018.pdf
10
votes
2answers
368 views

What are the next three numbers in this sequence?

What are the next three numbers in this sequence, and why? 110, 150, 230, 350, 550, 910, 1510, 2510... Hint 1: here's another sequence that follows identical rules. Hint 2: here's a third ...
-5
votes
1answer
136 views

Find the next number in the weird sequence

The following sequence has been made using a specific pattern and the last number is kept secret. We have to find that number along with the pattern followed to make the sequence. 3, 11, 32, 71, ...
6
votes
2answers
438 views

What is the rule?

I have a secret rule. Can you find out what it is, with this rule, I take in any number, and output two numbers! The answer to this puzzle is the same as the answer to the question: How do I get the ...
4
votes
0answers
178 views

A simple twist on a classic puzzle

Given this sequence: 0, 4, 84, 212, 1940, 358036, 14113428, 127377044 What is the next item? Hint:
-3
votes
2answers
224 views

What is the next number in the sequence and why?

7 4 11 2 14 5 18 3 21 ? Find the next number in the sequence?
1
vote
1answer
96 views

Find the missing number (number sequence puzzle) [duplicate]

Find the missing number 56784 = 4 11111 = 0 72348 = 3 88652 = 5 88811 = 6 75213 = 0 65465 = 3 62257 = ? I found this quiz in an archive of our company's ...
-1
votes
2answers
192 views

Is there any pattern involved in the following sequence? [closed]

Consider the numerical sequence $$800,1600,4800,6400,12000,6400, \cdots.$$ Is there any pattern involved in this sequence? I am very curious to know that. This puzzle is from a FlipKart Daily Quiz. ...
16
votes
1answer
1k views

Find d this ones stumped me help?

This one is annoying me so much. Got this from a maths teacher.
1
vote
1answer
132 views

Figure out the pattern

$0,4,8,21,52,65,96$ Given this set of numbers figure out the pattern they follow and write down the next seven numbers in the sequence. Hint:
1
vote
0answers
157 views

How do you solve this puzzle? [closed]

I don't know how to solve it. Please help me.
37
votes
3answers
7k views

What is the next number in the series: 21, 21, 23, 20, 5, 25, 31, 24,?

I came across a puzzle from a workbook for primary school students who wish to sit in exams for enrolling to selective high schools, which asks about what is the next number in the series. What ...
-3
votes
2answers
263 views

Next number in the sequence?

What is the next number in this sequence? 0, 6, 12, 19, 27, 35, 45, 54, 63, ? Good luck! HINT:
10
votes
1answer
248 views

The music of the heavens

A monastery has a curious practice: they call it the music of the heavens. The monks cycle through a cave with cups, to a stalactite at the center, which drips water. But this is not a steady ...
1
vote
1answer
95 views

Missing number in the table [closed]

This is my 3x3 grid: $$\begin{matrix} 2 & 6 & 8 \\ 3 & 7 & 3 \\ 6 & 4 & x \end{matrix}$$ Here x should be replaced with some number. Based on the solutions it should be x=1. ...
1
vote
1answer
97 views

What number should be in the place of “?”

I'm trying to solve this puzzle. Numbers are at triangle, and I have to solve ?-mark: 5 6 1 7 2 5 ? 7 5 Based on solutions it ...
-2
votes
1answer
433 views

A sequence to continue, if you know how

What's the next number in this finite sequence? 3, 3, 3, 3, 5, 2, 3, 3, 3, 2, 4, 2, 2, 3, 2, 3, 5, 3, 4, 4, 4, 3, 3, 1, 3, 5, 4, 5, 2, 3, 5, 2, 3, 3, 1, 4, 3, 1, 4, 2, 3, ? Hint added later: Hint ...
5
votes
1answer
228 views

What is the missing number in the question mark?

What is the missing number in the question mark? (My own puzzle) $(4, 3, 2),(4, 4, 4),(7, 9, 3),(8, 8, 4),(4, 12, 2),( 5, ?, 10)$ A) $1$ B) $3$ C) $5$ D) $10$ E) $66$ F) $14$
1
vote
0answers
116 views

What is the next number in this sequence [closed]

3, 8, 24, 72, 213, 668, 2064, 6312, ... What's the next number? This sequence mod 3 is 0, 2, 0, 0, 0, 2, 0, 0; mod 2 is 1, 0, 0, 0, 1, 0, 0, 0; mod 5 is 3, 3, 4, 2, 3, 3, 4, 2. And there seems to ...
3
votes
1answer
231 views

Continuation of a number sequence

What numbers are next in this sequence and why? 2, 4, 6, 8, 10, 11, 10, 10, 9, 14, 9, 10, 14, 14, 15, 16, 18 .... Hint: Hint 2:
1
vote
1answer
173 views

Which number is the odd-one-out in the above set?

In this number set there is something common between the numbers that makes them up into a pattern. Which one of these numbers break up the hidden pattern?
4
votes
1answer
209 views

Find pattern for new equation in number sequence

I saw this puzzle on this address. $3+5+7=152181$ $4+5+6=202461$ $3+4+7=122172$ $9+4+5=364518$ $8+6+8=?$ I know that first $4$ digits are $4864$. How could I find last $2$ ...
3
votes
0answers
164 views

Trying to figure a math puzzle/equation for a surprise trip using the date [closed]

I planning a surprise trip for my husband's 40th. He is a math geek. I am not. My plan is to tell him in a series of riddles/puzzles that he needs to figure out. We are going to LA to see his ...