Gopal's age is the cube of a number. It was the square of a number two years ago. What is his age?
Show answer & explanation
Correct answer: C
Explanation
Let Gopal's present age be a perfect cube.
• Check option (C) 27:
• Present age = (a perfect cube)
• Age two years ago = (a perfect square)
Both conditions are satisfied. Thus, Gopal's age is 27.