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