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