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