A alone would take 6 hours more to complete the job than if both A and B would work together. When B worked alone he took 1.5 hours more to complete the job and A and B worked together. How much time they will take if they if they work together?

A sum of money is invested at 20 % compound interest (compounded annually). It would fetch 723 more if interest is compound half-yearly. The sum is –

Which number among the following does not belong to the series 8, 27, 50, 125, 343?

While travelling downstream, a man can row 16 km more in 4 hours as compared to travelling upstream. What is the speed of the stream?

The area bounded by the lines x = 0, y = 0, x + y = 1, 2x + 3y = 6 (in square units) is 

The measure of each of two opposite angles of a rhombus is 60° and the measure of one of its sides is 10 cm. The length of its smaller diagonal is: 

What approximate value will come in place of the question mark (?) in the following questions?

324.995 x 15.98 ÷ 4.002 + 36.88 =? 

How much interest will be received in 2.5 years at the rate of 4 percent simple interest of Rs. 3,680?