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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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—...
Solve a new-parent dilemma with this math puzzle
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...
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.
Hang a painting poorly in this math 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...
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...
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...
Can you beat the puzzle master?
Can you beat the puzzle master? (Plus: find answers to Monday’s puzzle.)
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...
Can you beat the puzzle master? (Plus: find answers to Tuesday’s puzzle.)
Can you beat the puzzle master? (Plus: find answers to Wednesday’s puzzle.)
Can you beat the puzzle master? (Plus: find answers to Friday’s puzzle.)
Can you beat the puzzle master? (Plus: find answers to Sunday’s puzzle.)
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...
The puzzle was designed on 07/09/2026 You have to choose and comment on the option you have chosen :-)
Consider the following sequence: 000000001 = 1 000000010 = 7 000000100 = 13 000001000 = 19 000010000 = 25 000100000 = 31 001000000 = 37 010000000 = 43 100000000 ≠ 49 So… 1...
Can you beat the puzzle master? (Plus: find answers to Thursday’s puzzle.)
Can you beat the puzzle master? (Plus: find answers to Saturday’s puzzle.)
Can you beat the puzzle master? (Plus: find answers to Saturday’s puzzle.)
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...
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...
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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