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