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