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