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