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? Options.
A) 10
B) 12
C) 15
D) 20
E) 30
Answer   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   Option: 12
<result>B</result>
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?