Quantitative Aptitude - Arithmetic Ability Questions

If x1/4 + x-1/4 = 2, then what is the value of x81 + (1/x81)?

If 5% of (P + Q) = 20% of (P – Q), then P is what percentage of Q?

In the following question, select the odd letter from the given alternatives.

A solid sphere of radius 3 cm is melted to form a hollow right circular cylindrical tube of length 4 cm and external radius 5 cm. The thickness of the tube is

A bus moves at a speed of 84 km/hr after repairing and moves at a speed of 56 km/hr before repairing. It covers 2x distance in 8 hours after repairing.How much time (in hours) will it take to cover x distance before repairing?

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

What least value must be assigned to '*' so that the number 63576 * 2 is divisible by 8?

5 litres of honey contains 80% sugar. 3 litres of water is added to this honey. What is the percentage of sugar in the new mixture?