New posts in puzzle

Why does the infinite prisoners and hats puzzle require the axiom of choice?

puzzle axiom-of-choice

Probability in Minesweeper

probability puzzle

Generalisation of this circular arrangement of numbers from $1$ to $32$ with two adjacent numbers being perfect squares

number-theory elementary-number-theory graph-theory puzzle square-numbers

What is the least amount of questions to find out the number that a person is thinking between 1 to 1000 when they are allowed to lie at most once

puzzle information-theory

Tiling an $n\times n$ Grid

recreational-mathematics puzzle tiling

Armed with a sword and a shield, a proud knight combats a monstrous hydra with 100 heads.

linear-algebra proof-verification puzzle

java based programming challenges [closed]

java puzzle

Scores achievable in a game of darts

elementary-number-theory solution-verification puzzle

A loss and gain problem

puzzle

How to solve 5x5 grid with 16 diagonals?

puzzle

10 little dwarves

probability puzzle

Regularities when $n$ and $2n$ contain the same digits

puzzle decimal-expansion

Know the probability of $A$ beating $B$, also $B$ beating $C$, what's the probability of $A$ beating $C$ three games in a row?

probability algebra-precalculus contest-math conditional-probability puzzle

Understanding a riddle: How many flowers in a bouquet, if all but two are roses, all but two are tulips, and all but two are daisies?

algebra-precalculus puzzle

The thinking behind "4 times 5 is 12, and 4 times 6 is 13, and 4 times 7 is-oh dear! I shall never get to 20 at that rate!" from Alice in Wonderland?

number-theory puzzle

Does there exist a tool to construct a perfect sine wave?

geometry trigonometry recreational-mathematics puzzle geometric-construction

riddle that involves elementary geometry

geometry puzzle

Given $2n$ points in the plane, $n$ blue points and $n$ red points, no $3$ are collinear. Prove that we have at least two "balanced lines".

combinatorics geometry puzzle

Which jigsaw pieces fit to make a create a square?

recreational-mathematics puzzle inclusion-exclusion

Ten soldiers puzzle

geometry intuition puzzle recreational-mathematics