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