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