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