Solution
Given:
- •a and b are positive integers.
•Remainder when a is divided by b = Remainder when b is divided by a
To find:
- •The possible value of ab.
Approach and Working
The only case when the remainder of the division of a by b and b by a is equal when a=b.
Hence, ab =a^2
- •So, ab can only be a perfect square.
•And, among the given option only 36 is a perfect square.
Hence, the correct answer is B.
Correct answer: Option B
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