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