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