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