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