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