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