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