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