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