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