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