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