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