Latest updates for Calculation-Puzzle

Fresh curated links around calculation-puzzle are collected here so marketers can spot useful updates and turn timely ideas into posts faster.

Recent items include:

  • Mensa Number Puzzle book
  • A Rather Unusual Calculator
  • Filling it back up

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puzzling.stackexchange.com /3 weeks ago

Mensa Number Puzzle book

Hello Stack, could someone please help me with the problem from: The Mensa Number Puzzle Book-puzzle Mix - number 2 , page 53. thanks ralph

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puzzling.stackexchange.com /3 weeks ago

A Rather Unusual Calculator

Inspired by this Puzzling Stack Exchange question, which asks how to reach 2015 using only a restricted set of scientific-calculator functions. This puzzle takes the same basic ide...

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puzzling.stackexchange.com /6 days ago

Filling it back up

Oh no, I dropped this puzzle and most of the numbers fell out! Can you help me put it back together? There should be exactly one positive integer in each cell.

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puzzling.stackexchange.com /3 days ago

A deductive sequential puzzle

This puzzle challenges players to deduce the precise alignment of a linear sequence (displayed in the cartouche) mapped into a continuous circle. Because displaying the exact numer...

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puzzling.stackexchange.com /2 days ago

Wheel with algebraic expressions

A similar ''wheel'' appeared in an informal cognition test in my math class. Even though I will not get a grade for this test, I still want my math teacher to have an excellent rep...

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puzzling.stackexchange.com /1 month ago

Only you use 4 bottons in calculator without use 0 and answer will be 500 [closed]

You only use 4 bottons in calculator without use 0 and answer will be 500

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puzzling.stackexchange.com /1 month ago

Multiplication is banned in Wonderland

This story is entirely fictional and I apologise to Lewis Carroll for my poor attempt to replicate his wonderous weaving of Mathematics into fictional stories. I designed this for...

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puzzling.stackexchange.com /1 month ago

Adjacent Figures

To get the answer, you have to do something. What do you have to do?

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puzzling.stackexchange.com /3 weeks ago

Which letters go in the blank boxes of this alphanumeric Mensa puzzle?

Source: The Mensa Number Puzzle Book-puzzle Mix - number 2, page 53.

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puzzling.stackexchange.com /1 month ago

Negative Zero Minus One

This is a easy puzzle for a solver with reputation less than 1000. I remember back in the days when I was studying math on AoPS, I came across this user called negativezerominuson...

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puzzling.stackexchange.com /1 month ago

144 = 72 + 72, and no factor crosses between the figures

Write a distinct positive integer in each of the eight circles, so that the four in each figure sum to 72. Any two of the eight circles are joined by a line exactly when their numb...

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9gag.com /2 weeks ago

Good solution, I think

Tags: Puzzle, Math, meth, myth, moth2587 points, 203 comments.

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puzzling.stackexchange.com /3 weeks ago

Two pieces of a pie

You are one of a few participants in the final stage of a contest where the prize is a lifetime supply of your favorite flavor of pies. To win, you just have to score the most poin...

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puzzling.stackexchange.com /3 weeks ago

Two for me, one for you

58916 said “I had to do it twice to get there” 10021 replied “I just had to do it once” 58916 asked “With a TI-30 right?” 10021 answered “Of course, it wouldn’t work with a pen and...

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scientificamerican.com /3 weeks ago

Math Puzzle: A Tetris paradox

Explore the Tetris paradox in this math puzzle

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puzzling.stackexchange.com /2 days ago

Pick the correct option to complete a grid of shaded shapes

The puzzle was designed on 07/09/2026 You have to choose and comment on the option you have chosen :-)

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puzzling.stackexchange.com /2 weeks ago

Can you reconstruct the system from its receipt? [closed]

Can you reconstruct the system from its receipt? This image was generated from a specific systems architecture. The original specification has already been frozen, so there is a re...

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puzzling.stackexchange.com /4 weeks ago

Puzzle 69 from "Absolutely Nasty Kakuro" without guess-and-check

I'm having trouble solving a difficult Kakuro. This is part of puzzle 69 from Absolutely Nasty Kakuro by Conceptis Puzzles. All of the filled in squares are correct according to t...

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puzzling.stackexchange.com /1 month ago

I made gpt-5.6-sol create this original multilayer puzzle, then tested it against several reasoning models—and none coul...

The Last Margin I challenged GPT-5.6-sol to create an original, highly difficult multilayer puzzle. I have tested it against several AI reasoning models, but none has produced a va...

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puzzling.stackexchange.com /1 week ago

The Self-Counting Code [duplicate]

I have a nice puzzle for you. It goes like this: You are given the code 0123456789. Your task is to write a new 10-digit code underneath it. The digit in each position should indi...

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puzzling.stackexchange.com /2 weeks ago

Under Construction

This is my own puzzle. Can you solve it?

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puzzling.stackexchange.com /4 weeks ago

Pixel puzzle that becomes a cryptic crossword.

For the August MTC, and inspired by this post, I decided to try combining two rather different puzzles: a pixel puzzle (also known as a Nonogram) and a cryptic crossword Pixel Puzz...

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puzzling.stackexchange.com /3 weeks ago

Progressive matrix with hexagons in grids

There is a single rule that applies either across each of the rows or columns. By identifying the correct rule, it is possible to deduce the missing image in the last square. (Puzz...

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puzzling.stackexchange.com /1 month ago

Day: an enigmatic puzzle

This puzzle is part of Monthly Topic Challenge July 2026: Obscure Observances. Move a square in the right column up by one. What Braille letter is this? Rotate the image so the...

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