Questions tagged [sequence]

A puzzle about a series or collection of symbols, elements, or other objects, whose chosen ordering obeys a specific logical rule, which is usually to be determined.

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23 votes
1 answer
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Sergeant Sequence takes the case

It was 2am and Sergeant Sequence had been called in to Headquarters urgently. The second he stepped through the door a file was pressed into his hands by the Chief Investigator, who began to talk ...
Stiv's user avatar
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29 votes
12 answers
2k views

Shapes and letters. What is the missing box?

Finally, someone has figured it out. Good job.
Rudy Matunic's user avatar
23 votes
1 answer
1k views

A Sequence That Keeps Changing?

So I get this special sequence of "items" as the following: 2 1 3 4 7 8 2 5 2 3 9 But look! If I put some numbers (randomly) in front of the sequence: 3 4 2 1 3 4 7 8 2 5 2 3 8 And yeah! ...
athin's user avatar
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18 votes
1 answer
649 views

PSE Advent Calendar 2022 (Day 4): Letters to Father Christmas (Sgt. Sequence Fan-Fic)

This puzzle is part of the Puzzling Stack Exchange Advent Calendar 2022. The accepted answer to this question will be awarded a bounty worth 100 reputation.< Previous DoorNext Door > "Good ...
Jeremy Dover's user avatar
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33 votes
1 answer
3k views

The mystery flag

Part two - The mystery flag - twisted Based on these flags: (Count the sun in the Argentina flag as yellow) Which country does this flag belong to? Please explain why EDIT: I added a black ...
Beastly Gerbil's user avatar
20 votes
1 answer
766 views

What is the last integer in this sequence?

Here are the first several entries in a finite sequence of integers. $$ 31, 45, 71, 89, 91, 94, 111, 112, 118, 121, 126, 131, $$ $$ 134, 135, 139, 143, 144, 145, 148, 158, 161, 189, 193, 194, \dots $$ ...
Rubio's user avatar
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19 votes
1 answer
697 views

Chain Puzzle: Tabletop Games #01 - Let's Play

This is the first Chain Puzzle in the Tabletop Games series, in which all puzzles are themed around board games, card games, tile games, and the like. The answer to this puzzle is a thematic word or ...
Stiv's user avatar
  • 141k
18 votes
1 answer
624 views

A fortified nonogram

This puzzle is part 21 of Gladys' journey across the globe. Each part can be solved independently. Nevertheless, if you are new to the series, feel free to start at the beginning: Introducing Gladys. ...
Jafe's user avatar
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17 votes
2 answers
928 views

16 number puzzles on a blackboard

I have left you some number puzzles on the blackboard. Solve them and let me know what they spell. Hint:
DenverCoder1's user avatar
  • 10.5k
16 votes
1 answer
2k views

Can you solve this Country puzzle?

Given this sequence of flags, which flag should replace the question mark? Explain. Note: I added 'knowledge'-tag, but it's nothing complicated.
Prim3numbah's user avatar
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15 votes
1 answer
904 views

E Rebus Unum – a picture sequence puzzle

This is part 42 of the puzzle series Around the World in Many Days. Each part is solvable on its own. Dear Puzzling, Today I have been taking it easy. You might even say it has been a walk in the ...
Jafe's user avatar
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11 votes
2 answers
292 views

Finger sequence – find the continuation

Pick the correct continuation for the sequence. Options: Hint:
Jafe's user avatar
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10 votes
2 answers
480 views

12 more blackboard puzzles (letter puzzles)

I have previously posted number puzzles. This time it's letter puzzles. Some clues have a Harry Potter theme. Hint: Hint 2: Hint 3:
DenverCoder1's user avatar
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9 votes
1 answer
822 views

A sequence about you (Puzzling Stack Exchange users)

I have a mysterious sequence for you... $204, 186, 172, 133, 126, 123, 120, 119, 111, 107, 102, 96, 90, 87, 86, 86, 85, 79, 75, 73, 70, 68, 66, 66, 65, 65, 65, 64, 64, 64, ...$ This sequence may ...
palsch's user avatar
  • 851
7 votes
1 answer
420 views

Explain: 5-1=1, 5+1=1, 5=1

Explain the following equations. The final answer is 1 word. $4 ÷ 7 - 1 = 0\\ 1 \times 12 + 8 = 2\\ 0 ÷ 10 + 7 = 0\\ 9 \times 2 - 3 = 1\\ 5 - 1 = 1\\ 4 - 2 = 1\\ 2 \times 2 - 9 = 1\\ 5 = 1\\ 5 + 1 = ...
Lezzup's user avatar
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7 votes
1 answer
328 views

Fill The grid - 3.0

Can you fill this grid ? Version ($\pi$) In text: ?14516 243748 120581 17186? 01?857 HINT 1 HINT 2 HINT 3
19aksh's user avatar
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4 votes
1 answer
172 views

Fill the grid - 2.0

Can you fill this grid ? (Version 2.0 ) Text version 714523 191303 165088 213443 573211 91?12?
19aksh's user avatar
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3 votes
4 answers
454 views

Number Sequence Series – Question 1

I want to share a question that is 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: $3/2, 2/3, 3/4, 1/3,...
LETTERKING's user avatar
2 votes
2 answers
1k views

Had some real trouble with this logical sequence today [duplicate]

Reasonably sure I didn't get the job, but this particular part of their test really baffled me. The numbers of angle brackets in each row and column should probably add up to ten, so the missing ...
Barry H's user avatar
  • 21
-1 votes
3 answers
369 views

90, 135, 180 degrees, but no 225, find the pattern

Source: A question from an online test the psychology department at my university asked test subjects for an experiment. They gave me permission to share the question online. I originally asked my ...
user1098302's user avatar
-1 votes
3 answers
4k views

IQ test puzzle - sequence of shaded squares within a 3x3 grid

The IQ test was pretty jokes until the last question This one got me stumped. Source: https://www.iqtestforfree.net/free-iq-test.php
PDT's user avatar
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