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