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