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