Question

What must be subtracted from each of 7, 9, 11 and 15, so that the resulting numbers are in proportion?

Options

• 1

• 2

• 3

• 5

Answer 1

3

Explanation:

For subtraction by 3, the resulting numbers are 4, 6, 8 and 12. Since 4 : 6 = 8 : 12, they are in proportion.