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


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