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Questions tagged [number-sequence]

A puzzle in which the hidden pattern behind a given sequence of numbers (and, often, the next term) is to be found. Use with [sequence]

18 questions with no upvoted or accepted answers
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REALLY important days in history

@Z. Dailey asks a mathematical puzzle Important days in history... and to come! with a series of dates in years 1973, 1978, 1983, 1992, 2005. My puzzle asks the question: What is the previous date in ...
Haobin's user avatar
  • 11.7k
6 votes
0 answers
248 views

Sequence puzzle: 3, 9, 27

A twist of the classic sequence game: A friend asked me to find the rule to this sequence: 3, 9, 27. I am allowed to suggest other sequences to test if they follow that (unknown to me) rule, to which ...
user228245's user avatar
4 votes
0 answers
231 views

The smallest number

Some time ago I created a program to generate a table, and printed the first seven rows and columns. Somehow however I forgot to print the headers and the title of the table. I only remember that it ...
Retudin's user avatar
  • 9,208
4 votes
0 answers
828 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.
LETTERKING's user avatar
4 votes
0 answers
542 views

Binary puzzle in World of Warcraft

I apologize if this isn't appropriate here, but it's been driving me insane. Essentially, a puzzle was recently introduced in the video game World of Warcraft, which no one has been able to solve. ...
Kevin's user avatar
  • 141
4 votes
1 answer
553 views

Formula for the sequence 1, 1, 1, 21, 3, 1, 4, 1, 5, 1, 6, ... if the 21 isn't a mistake

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 ...
Hilario Mwansa's user avatar
4 votes
1 answer
540 views

Find next element of the sequence

Source of the question: Taken from the sub-Reddit r/askmath here: https://www.reddit.com/r/askmath/comments/15ar3ne/looking_for_the_answer_to_the_following_sequence/ What is the next element of the ...
user85272's user avatar
3 votes
0 answers
168 views

Odd one's out (sequence)

Once upon a time, there was a curious mathematician named Friedrich. One day, while exploring a new area of mathematics, he stumbled upon an intriguing sequence of numbers: 0, 1, 2, 2, 4, 3, 3, 4, 4, ...
Rubén's user avatar
  • 31
2 votes
0 answers
306 views

What's the missing number related to primes?

I would like to draw your attention to this mathematical sequence related to prime numbers I've created and ask what the missing number is. 2, 5, 27, 182, 2310, 27200, ______, 8998400, 223092870, ...
Ruleft's user avatar
  • 29
2 votes
0 answers
151 views

Find the next number in the below series

I created this puzzle. Find the next number in the following series: $$0, 1, 2, 2, 8, 36, 376, 16832, 6948320, 119573019392, 832844372118349824, 99591503127864016598742704128, ...
Suzuna Minami's user avatar
2 votes
0 answers
197 views

Find the next terms in this sequence. 4,82,1

Find the next few terms X, X, X. in this sequence Give your reasoning 4, 82, 1, 14, 84, 88, 0, 82, 81, 22, 12, X, X, X
Uvc's user avatar
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1 vote
0 answers
111 views

Can you find the missing letters?

A pattern of letters has had letters 10 through 20 deleted. Your job is to find out what letters should go in spots 10-20. Here is the pattern: a, b, c, d, d, d, f, e, f, _, _, _, _, _, _, _, _, _, _, ...
BigMistake's user avatar
1 vote
0 answers
192 views

Puzzle Challenge: Unraveling the the Circular Conundrum

Known are five numbers: 1, 2, 3, 4, and 5, arranged clockwise. The number after 1 is 2, after 2 is 3, after 3 is 4, after 4 is 5, and after 5 is 1. Whenever two adjacent numbers meet, it triggers a ...
Kevin's user avatar
  • 11
1 vote
0 answers
170 views

Two number patterns (clue: or geometrical shapes)

Solve the series: Series 1: 6 and 1 5 and 2 4 and 3 5 and 1 ??? Series 2: 6 and 1 5 and 2 5 and 1 4 and 3 ???
Erin's user avatar
  • 181
1 vote
0 answers
142 views

An increasing decreasing sequence

In math, there are all kinds of sequences 1545, 1218, 1071, 921, 851, 832, 799, 793, 774, 745, ... is (the start of) such as sequence What is the best number? Note: Even in math things change, so ...
Retudin's user avatar
  • 9,208
1 vote
0 answers
208 views

I need help deciphering what looks like a binary message

I was watching a YouTube video and it’s filled with secret messages and codes. The last two codes were in binary and inserting them into a translator provided correct answers. However, that's not ...
Vince's user avatar
  • 11
-3 votes
2 answers
419 views

The next term is?

A sequence of integers between 0 and 9 is as follows: 5, 8, 1, 0, 1, 8, 6, 2, 4, ? What is the next term? Hint:
Andrew Neate's user avatar
-7 votes
1 answer
283 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, 136, ...
Faiq Irfan's user avatar