Question

There were 84 marbles in a container. A boy took 14 of them and his father took
some too. 3/7 th
of the marbles were left in the container. How many marbles did father
take?

Answer 1

Ans: His father took 34 marbles.

Explanation: We start by working backwards.

3/7 of marbles were left.
3/7 of 84=84/7x3

             = 36

Marbles taken=84-marbles left

                       =84-36

                       =48

Marbles taken by father=48-marbles taken by boy

                                       =48-14

                                       =34

Father took 34 marbles.