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