Advent calendar 2016

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