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