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