9. A boy spendsof his pocket money and then of the remainder is given – InterviewSolution

1.	9. A boy spendsof his pocket money and then of the remainder is given to his sister. If he has & 40of the remainder is given to his sister. If he has 40left, what did he have at first?
Answer» Let pocket money be = xX -3/4x is amount remaining with him after spending money. X -3/4x= x/4 (on solving) now he gave 4/5of remaining amount to his sister. = x/4 - 4/5 of x/4= x/4 - x/5= x/20amount remaining with him is =40x/20=40x=800his pocket money is 800

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