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