55. A man collects cigarette stubs and makes one full cigarette with every 8 stubs. If he gets 64 stubs how many full cigarettes can he smoke?
Answer : 9.
56. A display flashes an alphabet after every 13 seconds . How many times will it flash between 1:57:58 am and 3:20:47 am?
Answer : 384.
57. A person with some money spends 1/3 for clothes, 1/5 of the remaining for food and 1/4 of the remaining for travel. He is left with Rs100/- . How much did he have with him in the beginning?
Answer : 250.