The rent of a room is Rs.75
3 roommates shared the rent.then the share of a person is Rs.25
they send this money to the owner with an other person.the owner took
Rs.70 and gave Rs.5 to that person.He had a tea for Rs.2 and gave the
balance Rs.3 to the roommates.then the share of each person is Rs.24
Then where is the 1 ruppee???