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