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