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