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