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15
Math.TechQA.Club
2026-04-10 04:55:01
93
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Addition with ones and tens
Published on
10 Apr 2026 - 4:55
#logic
#puzzle
642
Views
16-puzzle: confusion over the number of inversions
Published on
02 Apr 2026 - 13:35
#permutations
#puzzle
395
Views
What's the formula for the number of possible answers to this puzzle?
Published on
16 Sep 2018 - 6:46
#combinatorics
#puzzle
258
Views
Given a painted cube composed of smaller cubes, what is the probability of an unpainted cube given you see 5 unpainted faces?
Published on
18 Sep 2018 - 20:26
#probability
#puzzle
149
Views
find the treasure.
Published on
19 Sep 2018 - 9:04
#puzzle
24.8k
Views
How does the three piles magic trick work?
Published on
08 Apr 2026 - 17:50
#recreational-mathematics
#problem-solving
#puzzle
1k
Views
The 3 Gods riddle
Published on
20 Sep 2018 - 9:05
#logic
#puzzle
19
Views
I alphabetize a large number of two-letter words. What is the expected ratio of words starting with A to words starting with B?
Published on
26 Sep 2018 - 1:02
#probability
#limits
#puzzle
432
Views
The problem of dividing 3kg flour to three 1kg parts using a balance
Published on
10 Apr 2026 - 8:07
#algorithms
#puzzle
429
Views
Hat-guessing problem for finitely many prisoners and infinite sets of hat colors and the Axiom of Choice
Published on
29 Mar 2026 - 15:16
#puzzle
#axiom-of-choice
194
Views
What is the probability that Fra wins?
Published on
10 Apr 2026 - 0:42
#probability
#recreational-mathematics
#problem-solving
#puzzle
1.5k
Views
Filling pool with 3 hoses puzzle!
Published on
08 Apr 2026 - 21:12
#puzzle
246
Views
Find the unknown area by different methods
Published on
27 Mar 2026 - 19:29
#geometry
#trigonometry
#puzzle
#area
642
Views
Armed with a sword and a shield, a proud knight combats a monstrous hydra with 100 heads.
Published on
07 Oct 2018 - 11:57
#linear-algebra
#proof-verification
#puzzle
90
Views
How did we know that X must be equal to 1?
Published on
09 Apr 2026 - 0:55
#proof-explanation
#puzzle
#cryptarithm
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