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