Quantitative Aptitude - Arithmetic Ability Questions

What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?

The product of two numbers is 20. One of them is 1.25. What is the other number?

What is the slope of the line parallel to the line passing through the points (5, -1) and (4, -4)?

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 options.

Solve : (x + 2y) (2x - y)

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.

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.

In a triangle the length of the side opposite the angle which measures 30 degree is 9√3 cm, what is the length of the side opposite to the angle which measures 60 degree?