Quantitative Aptitude - Arithmetic Ability Questions

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

For what value of X, 211X will be a perfect square?

Find the missing digit if it has 11 and 13 as factors?

A spherical glass vessel has a cylindrical neck 7 cm long and 4 cm in diameter. The diameter of the spherical part is 21 cm. Find the quantity of water it can hold.

The least number that must be substracted from 63520 to make the result a perfect square is

If cos 60° - sec 30° = x, then the value of x is

What is the value of Cot 45° + Cosec 60°?

If 51.97 ­ (81.18 -­ x ) ­- 59.39 = 5.268, then value of x will be