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