A students was asked to multiply a number by 3/2 but he divided that number by 3/2. His result was therefore 10 less than the correct answer. Find the number?
Correct Answer: 12
Explanation:
Let the number be N.
According to the question,
(N x 3)/2 - N / (3/2) = 10
⇒ 3N/2 - 2N/3 = 10
⇒ (9N - 4N) / 6 = 10
⇒ 5N / 6 = 10
∴ N = (10 x 6)/5 = 12
