How many terms are there in the series of 20, 25, 30, .........., 140?

If the compound interest of a certain sum of money for two successive years be Tk. 225 and Tk. 238.5, What is the rate of interest per annum?

8 taps through which water flows are the same rate can fill a tank in 30 minutes. If 2 taps go out of order, how long will the remaining taps take to fill the tank?

If A's income is 25% less than that of B, then what percent is b's income more than that of A?

The sale price of an article including the sales tax is Tk. 616. The sales tax rate is 10%. If the shopkeeper has made a profit of 12%, then the cost of the article is-

How much will it cost to fence in a field that is 360 cm long and 160 cm wide with a fence that costs Taka 100 per meter?

If $\sqrt[3]{32}$ (cube root of 32) = $2^x$ , the value of x = ?