# What will be Mary’s age when Adam is twice as old as her?

Adam who is 20 years old is 4 times as old as Mary. What will be Mary’s age when Adam is twice as old as her?

- 17 years
- 30 years
- 35 years
- 15 years

**Answer: (4) 15 years **

**Explanation:-**

The age of Adam = 20 years

Adam is 4 times as old as Mary.

Then, the age of Mary = 20/4

= 5 years

If the age of Adam is 20 + 10

= 30 years

Then, the age of Mary is 5 + 10 = 15 years.

Thus, Mery will be 15 years old when Adam is twice as old as her.

Hence, the correct answer is option (4) 15 years.