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