Quantitative Aptitude - Arithmetic Ability Questions

The number of diagonals in a pentadecagon is

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the

25 - 1/2{5 + 4 - (3 + 2 - 1 + 3)} = ?

The perimeter and the breadth of a rectangle are 46 cm and 8 cm respectively. Calculate the length of its diagonal (in cm).

Find the total surface area (in cm²) of a right circular cylinder of diameter 28 cm and height 12 cm.

In ΔPQR measure of angle Q is 90 deg. If tanP = 24/7, and PQ = 14cm, then what is the length (in cm) of side QR?

In a triangle, the length of the side opposite the angle which measures 45° is 16 cm, what is the length of the side opposite to the angle which measures 90°? 

The centroid of a triangle is the point where