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


Advent calendar 2017

14 December

There are 204 squares (of any size) in an 8×8 grid of squares. Today's number is the number of squares in a 13×13 grid of squares


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


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