Quantitative Aptitude - Arithmetic Ability Questions

In ΔDEF measure of angle E is 90 deg. If cotD = 8/15, and DE = 16cm, then what is the length (in cm) of side EF?

If sin ­-240° = x, then the value of x is

For the figure given below, find the value (in degrees) of 2∠A + ∠B.

Which of the following will give a terminating decimal?

Two pipes X and Y can individually fill a tank in 48 and 72 min respectively. If they are opened simultaneously, how long will it take for the tank to fill? 

A tap can fill a tank in 20 minutes. If a leakage is capable of emptying the tank in 60 minutes, the tank will be filled in

An angle is smaller than its supplementary by 30°. What is the measure of the angle?

At least two pairs of consecutive angles are congruent in a _____.