List questions from recreational-mathematics

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Determine the best strategy for Bob in this game

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Necklace combinations with three group of beads

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finding x,y,z for optimizing expression

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Group testing for a virus

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Values of n(S) such that the gears can rotate at once

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Sharing a simpler solution to a problem from putnam and beyond

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How do I show that $x+(1-\alpha)y < 0$ for all $0<\alpha < 1$?

Published on 10 May 2020 - 19:37

264

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Erase every other number from $1, 2, 3, ... 2000$ until only one number left

Published on 10 May 2020 - 19:54

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Ideals and representations of $C_0(X,A)$

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verifying if this vector result is true

Published on 14 May 2020 - 14:26

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What constants make the integral equal to $1$?

Published on 25 Mar 2026 - 21:22

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why can't we use binomial theorem to expand this expression

Published on 30 Mar 2026 - 11:15

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Could a polygonal path on $n \times n$ lattice cross itself?

Published on 01 Apr 2026 - 17:26

683

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Leapfrogs puzzle -- Least number of moves needed to interchange the pegs

Published on 18 May 2020 - 3:57

List Question

Difference between arrangement and order

Determine the best strategy for Bob in this game

Necklace combinations with three group of beads

finding x,y,z for optimizing expression

Group testing for a virus

Values of n(S) such that the gears can rotate at once

Sharing a simpler solution to a problem from putnam and beyond

How do I show that $x+(1-\alpha)y < 0$ for all $0<\alpha < 1$?

Erase every other number from $1, 2, 3, ... 2000$ until only one number left

Ideals and representations of $C_0(X,A)$

verifying if this vector result is true

What constants make the integral equal to $1$?

why can't we use binomial theorem to expand this expression

Could a polygonal path on $n \times n$ lattice cross itself?

Leapfrogs puzzle -- Least number of moves needed to interchange the pegs

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