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