Quantitative Aptitude - Arithmetic Ability Questions

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 given alternatives.

An object travels 24 m in 3 s and then another 15 m in 2 s. What is the average speed of the object?

ΔABC is similar to ΔDEF. If the ratio of similar sides is K:1, the ratio of their areas is

The radius of a sphere and right circular cylinder is 'r'. Their volumes are equal. The ratio of the height and radius of the cylinder is:

8 x {5 - (-2) x (-3)} = ?

ΔPQR is right angled at Q. If m∠P = 45°, then find the value of (cosecR + 1/3).

The number of sides of a regular polygon whose exterior angles are each 72 deg is

In triangle DEF measure of angle E is 90 deg. If cotD = 5/12 and DE = 1 cm, then what is the length (in cm) of side EF?