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