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