Click here to win prizes by solving the puzzle Advent calendar.
Click here to win prizes by solving the puzzle Advent calendar.


Advent calendar 2015

3 December

In August, I wrote about MENACE, a machine learning robot built from matchboxes which plays noughts and crosses. How many matchboxes are needed to build MENACE?
Tags: menace


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Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

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


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