Quantitative Aptitude - Arithmetic Ability Questions

If the standard deviation of a population is 10, what would be the population variance?

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

Solve the following : 3/4+{3/4 + 3/4 ÷ (3/4 + 3/4)} = ?

If x+1x ≠0 and x3+1x3 = 0, then the value of x+1x4 is :

If (x/5) + (5/x) = – 2, then what is the value of x3?

If a person bought an item for Rs. 60 and sold it at a profit of 25%, the selling price of the item would be

If 169 is subtracted from the square of a number, then the result obtained is 7056. What is the number?

Rameshwar goes on a trip on his motor-cycle and rides for 405 kms. If he rides for 6 hours at a speed of 45 km/hr, find at what speed he travels for the remaining 3 hours of the journey?