# 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

floors menace rectangles squares coordinates coins crossnumbers geometry crosswords quadratics cryptic crossnumbers surds ave remainders digits square numbers hexagons cryptic clues polygons triangle numbers partitions balancing colouring people maths taxicab geometry unit fractions trigonometry speed time averages chalkdust crossnumber complex numbers probability spheres square roots books perimeter logic factors mean proportion multiplication chess sums algebra irreducible numbers probabilty circles clocks money angles addition factorials bases numbers multiples functions volume sport integration graphs christmas integers 2d shapes dodecagons triangles rugby shape area fractions differentiation sequences parabolas sum to infinity scales dice arrows wordplay means routes dates prime numbers pascal's triangle cards percentages advent 3d shapes cube numbers lines calculus chocolate division shapes grids odd numbers folding tube maps planes indices games ellipses symmetry regular shapes doubling palindromes star numbers perfect numbers number## 23 December

Today's number is the area of the largest area rectangle with perimeter 46 and whose sides are all integer length.