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


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


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