Smita was asked to multiply a certain number by 36. She multiplied it by 63 instead and got an answer 3834 more than the correct one. What was the number to be multiplied?
(a)126
(b)142
(c)148
(d)152
(e)None of these
Answer
Answer (as printed): B
Explanation
Let the number be x. Then, 63x – 36x = 3834 ⇔ 27x = 3834 ⇔ x = 142.
Explanation as extracted from the printed page; notation may be imperfect.