.In a group of 135 persons, 50% people contributed tk. 40 each, 30% contributed Tk. 60 each and the remaining persons contributed Tk. 80. Find the average contribution for the group.

The length of one side of a square inscribed in a circle is 2. What is the area of the circle?

If 4% of (P + Q) are 8 and P is a positive integer. What is the greatest possible value of Q?

Income of A is 25% less than B. What percent B's income would be more than A?

If a rectangle's length and width are both doubled, by what percent is the rectangle's area increased?

A box contains 90 nuts each of 100 gm and 100 bolts each of 150 gm. If the entire box weighs 35.5 kg, then fin...

A wholesaler bought 1200 radios for Tk. 18 each. The wholesaler sold 60 percent of the radios for Tk. 30 each...