Gopal’s current age is the cube of a number. It was the square of a number two years ago. What is his current age?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 27
| Understanding | Application |
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Let Gopal's current age be x ATQ, x should be the cube of a number and (x - 2) should be the square of a number. |
Let us consider all the given options: 1. 9 is not the cube of any number. 2. 27 is the cube of 3 and (27 - 2), i.e. 25 is the square of 5. 3. 64 is the cube of 4 and (64 - 2), i.e. 62 is not the square of any number. 4. 62 is not the cube of any number. Hence, Gopal's current age is 27 years. |