Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

The length of shadow of a tower is √3 times that of its length. The angle of elevation of the sun is

The diameter of the driving wheel of a cart is 154 cm. Calculate the revolution per minute [RPM] of the wheel in order to keep a speed of 33 kmph?

What is the sum of the measures of all the interior angles of a regular polygon of 6 sides?

The smallest of the fractions among 5/8, 3/4, 13/16, 7/12 is ___.

Identified the odd one from the list below.

Which of the following numbers is completely divisible by 99?

The value of cos0 deg is