Advent calendar 2017

23 December

In the song The Twelve Days of Christmas, how many presents have been given after 8 days?


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Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

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


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