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