2 December

What is the maximum number of lines that can be formed by the intersection of 30 planes?


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


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