Three friends who stay in lodge sent Room boy to buy Banana. They gave him 6 rupees each. He went to the Shop Banana were not so good, Since the Bananas were not so good, the shop-keeper gave back 5 rupees. The Room boy returned and gave each lodger 1 rupee and kept the balance of 2 with him. Each lodger thus paid only Rs 5/- for the Bananas but 5x3=15+2=17.
Who took the missing one rupee..??
Before you go for the answer please comment your answer below!
The two rupees that the Room Boy took is part of Rs.15. Therefore you can't add it but it must be substracted. The actual amount they spent for the Bananas is Rs. 13 ie 13+3+2=18 or 15-2=13+5=18