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