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