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