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