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