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