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