Quantitative Aptitude - Arithmetic Ability Questions

Determine the largest 4 digit number which is a perfect square.

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

One pipe can fill an empty cistern in 4 hours while another can drain the cistern when full in 10 hours. Both the pipes were turned on when the cistern was half-empty. How long will it take for the cistern to be full?

The point equidistant from the sides of a triangle is called

Which of the set of three sides can't form a triangle?

If 3x2 - ax + 6 = ax2 + 2x + 2 has only one (repeated) solution, then the positive integral solution of a is

Which of the following quadratic equations has real roots?

Convert binary 10110 to decimal.