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