IMAS 2011 — Upper Primary Grades 5–6 — Round 1 Question 7

Question 7

From $2+2=2\times2$, we observe that the sum of the two numbers 2 and 2 is equal to their product. Of the following pairs of numbers, which has this property?

2 and $ \frac{2}{3} $
3 and $ \frac{3}{2} $
4 and $ \frac{4}{5} $
5 and $ \frac{6}{5} $
6 and $ \frac{7}{5} $