exam Maths Puzzle Numerical Ability

if the question asks find the domain of g(x)
find the domain of f(g(x))
find the domain of g(f(x))
and the equations are f(x)=1/x and g(x)= square root(x-2)

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exam Other Question

what is quadrant 1 2 3 &4 A man lived a fourth of his life as a boy, a fifth as a young man and a third as an adult. He spent 13 years in his old age. How old was he when he died?