$\left(\dfrac{3}{7} - \dfrac{1}{7}\right) \div \dfrac{2}{7}$ equals

$\left(\dfrac{3}{7} - \dfrac{1}{7}\right) \div \dfrac{2}{7}$ equals
  1. $1$
  2. $\dfrac{2}{7}$
  3. $\dfrac{4}{49}$
  4. $2$

Solution

$\dfrac{2}{7} \div \dfrac{2}{7} = 1$.

Asked in: IMO

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