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