Quantitative Aptitude - Arithmetic Ability Questions

If the perimeter of a semi-circle is 36 cm, then find its radius (in cm).

The vertical angle A of an isosceles triangle ΔABC is three times the angle B of it. The measure of the angle A is

What is the reflection of the point (-4, 3) in the line x = -2?

In an isosceles triangle ABC, AB = AC, XY || BC. If ∡A = 30, then ∡BXY =

The sum of three numbers is 2, the 1st number is 1/2 times the 2nd number and the 3rd number is 1/4 times the 2nd number. The 2nd number is

To get number 40, the number 56/9 should be multiplied with

Pipe A can empty a filled tank in 28 hours while Pipe B can fill the same tank, when empty in 35 hrs. If alternatively Pipes A and B are turned on for an hour each time, starting when the tank is full, how long will it take to empty the tank?

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is