# 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 ...
• 11.7k
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 ...
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 ...
• 9,208
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.
• 329
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. ...
• 141
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 ...
540 views

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, ...
• 31
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, ...
• 29
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, ...
• 1,583
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
• 5,899
1 vote
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, _, _, _, _, _, _, _, _, _, _, ...
• 111
1 vote
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 ...
• 11
1 vote
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 ???
• 181
1 vote
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 ...
• 9,208
1 vote
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 ...
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