exam Maths Puzzle Numerical Ability

if f(x)=x-5 and g(x)=x^2+3, find f[g(-2)]

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exam Other Question

The sum of the digits of a two-digit number equals 1/7 of the number. If the digits are reversed, the new number is 27 less than the original number. Find the original number. -3x+10>16 or 9-x<7