2 December

Today's number is the area of the largest dodecagon that it's possible to fit inside a circle with area \(\displaystyle\frac{172\pi}3\).

Show answer


Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020