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