If 3a+4b = 10 and 5a+3b=30, what is the average (arithmetic mean) of a and b ?

The number of marbles in Amin's collection is 80% of the number in Rahim's collection. If Rahim has 80 more ma...

A water reservoir is 1/5 th full and requires 20 liters more to make it 3/5 th full. What is the capacity of t...

A third of Karim's marks in Mathematics exceeds a half of his marks in Social Studies by 30, if Karim got 240...

In dividing a sum of money, the eldest of three brothers got 2/5 th of it and the youngest got Tk 120. What wa...

Of 30 applicants for a job, 14 had at least 4 years experience, 18 had degrees, and 3 had less than 4 years ex...

Laboni bought a 1-year, Tk 10,000 certificate of deposit that paid interest at an annual rate of 8 percent com...