Mr. X had Tk. 1000 in his savings account. Every month in the first week he needs money, so he withdraws Tk. 500, but by the end of the month , he deposits Tk. 750. After how many months, the original amount will grow three times?

Two small circular parks of diameter 16 meter and 12 meter are to be replaced by a bigger circular park. What...

A student obtained 60, 75 and 85 marks respectively in 3 monthly examinations in physics and 95 marks in the f...

At a stationary shop, it costs Tk. 185 for 4 gel-pen, 8 ball -point pens and 1 marker pen and Tk. 315 for 7 ge...

The average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly added. The first one i...

In a certain population group, 57% of the people have characteristics, X and 63% have characteristics Y. If ev...

M is older than N but younger than O. If m, n and o are the ages of M, N and O respectively, then which of the...