Advent calendar 2016

17 December

The number of degrees in one internal angle of a regular polygon with 360 sides.


Show me a random puzzle
 Most recent collections 

Advent calendar 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2021