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