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