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