A person buys certain number of marbles at 20 per taka and an equal number at 30 per taka. He mixes them and sells them at 25 per taka. His gain or loss in the transaction is-
The difference between two numbers is 5 and the difference between their square is 65. What is the smaller number?
A plane traveling at 600 miles per hour is heading for Chittagong airport. At 3.58 pm it was 30 miles from the airport. At what time it will arrive at 600 at the airport?
4.01 pm
4.02 pm
4.18 pm
4.20 pm