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