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


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


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