Railways
R.R.C. (Hajipur) Solved Paper Held on 1st Shift 30-11-2014
question_answer
A boy was asked to multiply a number by 12. By mistake, he multiplied the number by 21 and got his answer 63 more than the correct answer. The number was?
A)7
B)8
C)9
D)12
Correct Answer:
A
Solution :
Suppose number = x Then, \[x\times 12+63=x\times 21\] \[63=x\times 9\] \[x=7\]