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