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