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