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