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