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