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