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