Latest updates for Calculation-Puzzle

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Recent items include:

  • No-calculation alphametic puzzle
  • Math Puzzle: Baby bottle mix-up
  • Roll with the changes

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puzzling.stackexchange.com /5 days ago

No-calculation alphametic puzzle

The puzzle: Here’s an alphametic puzzle showing long multiplication of two three-digit numbers (no leading zeroes). As usual, each of the seven symbols represents a distinct digit—...

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scientificamerican.com /4 days ago

Math Puzzle: Baby bottle mix-up

Solve a new-parent dilemma with this math puzzle

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puzzling.stackexchange.com /4 weeks ago

Roll with the changes

I was playing a game with some friends, and created the following grid while fiddling with one of the components. What number(s) should go in the empty square? 1 3 9 5...

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puzzling.stackexchange.com /1 month 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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scientificamerican.com /1 month ago

Math Puzzle: A puzzling picture

Hang a painting poorly in this math puzzle

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puzzling.stackexchange.com /1 month 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 /1 month 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

Numbers in stacked boxes: what goes in the question mark?

In the picture, we see a few examples of different outputs after some moves of the colored boxes. Our task is to understand the logic behind these outputs, deduce the pattern, and...

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thejournal.ie /2 weeks ago

Maths Week: Your first 2026 puzzle

Can you beat the puzzle master?

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thejournal.ie /1 week ago

Maths Week 2026: Your Tuesday puzzle

Can you beat the puzzle master? (Plus: find answers to Monday’s puzzle.)

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puzzling.stackexchange.com /3 weeks ago

Putting two and three together makes ... ten?

Following are several pairs of numbers, one having two digits and one having three digits. These pairs have some feature in common which is unique among all pairs of two- and three...

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thejournal.ie /1 week ago

Maths Week 2026: Your Wednesday puzzle

Can you beat the puzzle master? (Plus: find answers to Tuesday’s puzzle.)

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thejournal.ie /1 week ago

Maths Week 2026: Your Thursday puzzle

Can you beat the puzzle master? (Plus: find answers to Wednesday’s puzzle.)

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thejournal.ie /1 week ago

Maths Week 2026: Your Saturday puzzle

Can you beat the puzzle master? (Plus: find answers to Friday’s puzzle.)

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thejournal.ie /1 week ago

Maths Week 2026: Your Monday puzzle

Can you beat the puzzle master? (Plus: find answers to Sunday’s puzzle.)

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game.giveawayoftheday.com /5 days ago

KL Perfect Ten

This number puzzle challenges you to prove that counting to ten can still be tricky. A square grid is filled with cells holding values from zero to nine, and your goal is to connec...

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puzzling.stackexchange.com /1 month 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 /1 month ago

A Novel Puzzle “Dewey’s Chexsum”

Consider the following sequence: 000000001 = 1 000000010 = 7 000000100 = 13 000001000 = 19 000010000 = 25 000100000 = 31 001000000 = 37 010000000 = 43 100000000 ≠ 49 So… 1...

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thejournal.ie /1 week ago

Maths Week 2026: Your Friday puzzle

Can you beat the puzzle master? (Plus: find answers to Thursday’s puzzle.)

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thejournal.ie /6 days ago

Maths Week 2026: Your Sunday puzzle

Can you beat the puzzle master? (Plus: find answers to Saturday’s puzzle.)

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thejournal.ie /1 week ago

Maths Week 2026: Your Sunday puzzle

Can you beat the puzzle master? (Plus: find answers to Saturday’s puzzle.)

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puzzling.stackexchange.com /1 month ago

The house wins big in minesweeper

Your casino has been doing really well these last few weeks. People all over the country are flocking over to try your casino-style minesweeper game! But with only a 0.0053% house...

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puzzling.stackexchange.com /1 month ago

Integer maze: A maze you can do in your head

You are trying to reach 61, starting from 1. What are the fewest moves required to do this? You must repeat the following set of moves, in order (beginning with the first): ±20 ±s...

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puzzling.stackexchange.com /1 month ago

A 5x5 Pipes puzzle: solve without guessing

I was playing Pipes at https://hexapipes.vercel.app/ when I came across this extremely difficult one. I'd like to know how it could be solved without guessing. Rules of Pipes: Eac...

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feeds.feedburner.com

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puzzling.stackexchange.com

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thejournal.ie

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