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