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