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