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