Advent calendar 2018

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


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


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