Quantitative Aptitude - Arithmetic Ability Questions

If Cosecθ + Cotθ = 2, then Cotθ = ?

Which of the following can't be the unit's digit of a perfect square?

Which of the following numbers is not a prime number?

From the top of a platform 5 m high, the angle of elevation of a tower was 30 deg. If the platform was positioned 40√3 m away from the tower, how tall was the tower?

If 12x2 - ax + 7 = ax2 + 9x + 3 has only one (repeated) solution, then the positive integral solution of a is

The line parallel to the BC of the triangle ABC divides the other two sides at the point D and E in such a way that AB=3AD. Calculate the ratio of DE and BC.

The total surface area of a cube is 73.5 sq.cm. Find its side (in cm).

The mean of the data 3, 10, 10, 4, 7, 10, 5 is