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