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