$\dfrac{3}{4}$ of a number is $9$. The number is

$\dfrac{3}{4}$ of a number is $9$. The number is
  1. $12$
  2. $6$
  3. $8$
  4. $15$

Solution

$9 \div \dfrac{3}{4} = 12$.

Asked in: IMO

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