Quantitative Aptitude - Arithmetic Ability Questions

If P = 7 + 4√3 and PQ = 1, then what is the value of (1/P2) + (1/Q2)?

The ratio of sand to gravel in a mixture is 17:8 while that between gravel and cement is 6:17. What is the ratio of sand to cement in the mixture?

The difference between compound interest and simple interest on Rs. 5000 for 2 years at 8% per annum payable yearly is

The sum of a fraction and 7 times its reciprocal is 11/2. What is the fraction?

A rice trader buys 12 quintals of rice for Rs 1,870. 15% rice is lost in transportation. At what rate should he sell to earn 20% profit?

The average of 8 consecutive natural numbers is 38.5. What is the largest of these 8 numbers?

A car travels from A to B with 40 Km/h and returns from B to A with 60 Km/h. Its average speed during the whole journey is

Excluding stoppages, the speed of a bus is 60 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?