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