Quantitative Aptitude - Arithmetic Ability Questions

What is the difference of the factors of the expression x2 + (1/x2) – 6?

The total surface area of a hemisphere is 166.32 sq cm, find its radius?

A non-zero number is greater than 7 times its reciprocal by 9.3. What is the number?

If 4x + 3y = 11 and 3x + 2y = 8, then (x,y) is

A bag contains coins of denominations Rs.1, Rs.5 and Rs.10. Assuming there are equal number of Rs.1, Rs.5 and Rs.10, what will be the total number of coins in the bag be if the total money is Rs. 368?

The cash difference between the selling price of an article at a profit of 4% and 6% is Rs. 3. The ratio of two selling prices is:

What is the third proportional to 10 and 20?

Find the value of '?' in 512 × 125 ÷ 15625 = 3125 × 25?