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