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