Quantitative Aptitude - Arithmetic Ability Questions

One of four words is a class of which the other three belong. Identify the class.

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.

97 x 97 = ?

What smallest number should be added to the sum of squares of 15 and 14, so that the resulting number is a perfect square?

Calculate the difference between the square of the largest and smallest two-digit prime numbers.

An angle in a semicircle is

The area and the length of one of the diagonals of a rhombus is 60 cm2 and 8 cm respectively. Find the length of its other diagonal (in cm).

What is the curved surface area (in cm²) of a hemisphere of diameter 42 cm?