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