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.

Which pair is not similar to the other three?

What are the components of X6 - X4 - X5 - X4 + X2 - 4?

Calculate the sum of squares from 1 to 9.

In the following question, select the odd letter/letters from the given alternatives.

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 height of a cone is 24 cm and the area of the base is 154 cm2 . What is the curved surface area (in cm2) of the cone?

Two fractions are such that their product is ­9/10 and sum is ­13/40. What are the two fractions.