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