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