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