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