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