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