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