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