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