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