Advent calendar 2017

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