A bank offers 5% compound interest calculated on half-yearly basis. A customer deposits Tk. 1600 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is :

Two numbers are respectively 20% and 50% mor than a third number. The ratio of the two numbers is :

The average of four consecutive odd positive integers is always.

If 5 students run a mile in 5 minutes, how much time will 50 students take to run a mile?

If the following series continues to follow the same pattern, what will be the next number : 2, 6, 3, 9, 6, .....

Desscribel the following sequence in mathematical terms : 144, 72, 36, 18, 9

Find the average of all whole number between 1 and 100 that end in 3.