# Puzzles

## Archive

Show me a random puzzle**Most recent collections**

#### Sunday Afternoon Maths LXVII

Coloured weightsNot Roman numerals

#### Advent calendar 2018

#### Sunday Afternoon Maths LXVI

Cryptic crossnumber #2#### Sunday Afternoon Maths LXV

Cryptic crossnumber #1Breaking Chocolate

Square and cube endings

List of all puzzles

## Tags

probability bases chess calculus perimeter sequences algebra speed time cryptic clues coordinates polygons games crosswords area advent clocks indices 3d shapes dates unit fractions menace dodecagons multiplication crossnumbers sport scales integration books percentages remainders cards circles money factors complex numbers squares quadratics symmetry square numbers numbers chalkdust crossnumber means cube numbers ave spheres ellipses shapes factorials sums lines irreducible numbers odd numbers division christmas rugby rectangles colouring sum to infinity 2d shapes hexagons coins mean people maths addition functions regular shapes arrows volume folding tube maps chocolate taxicab geometry surds digits shape logic square roots proportion palindromes partitions probabilty prime numbers differentiation averages integers grids trigonometry balancing fractions routes angles triangle numbers wordplay geometry star numbers planes triangles floors parabolas graphs multiples cryptic crossnumbers doubling dice perfect numbers pascal's triangle number## Placing plates

Two players take turns placing identical plates on a square table. The player who is first to be unable to place a plate loses. Which player wins?