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