Quantitative Aptitude - Arithmetic Ability Questions

If  x = a + 1/a, y = a - 1/a, then the value of x4+y4-2x2y2

Solve the following : -1/4 { -45 - (-96) / (-32)} = ?

How many 100 digit positive number are there?

If (x + 1/x) = 3, then x8+1x8 is equal to

The ratio of ages of the father and mother was 11:10 when their son was born. The ratio of ages of the father and mother will be 19:18 when the son will be twice his present age. What is the ratio of present ages of father and mother?

M is the largest three digit number which when divided by 6 and 5 leaves remainder 5 and 3 respectively. What will be the remainder when M is divided by 11?

Find the fourth proportional to 2, 3, 6.

The marked price of an article is 60% more than its cost price. What maximum discount percentage can be offered by the shopkeeper to sell his article at no profit or no loss?