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