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