Quantitative Aptitude - Arithmetic Ability Questions

Which of the following pairs is NOT a pair of twin primes?

What is the sum of the measures of all the interior angles of a regular polygon of 5 sides?

The point of the intersection of three medians is known as the ____________.

What is the sum of the measures of all the interior angles of a regular polygon of 9 sides?

The angle of elevation of an aeroplane as observed from a point 30 m above the transparent water-surface of a lake is 30° and the angle of depression of the image of the aeroplane in the water of the lake is 60°. The height of the aeroplane from the water-surface of the lake is

Rearrange the jumbled up letters in their natural sequence and find the odd one out.

Find the curved surface area (in cm2) of a right circular cylinder of diameter 7 cm and height 6 cm.

Two pipes namely A,B can fill a sump in 25 minutes and half an hour respectively and a pipe C can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity off the tank is