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