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