Quantitative Aptitude - Arithmetic Ability Questions

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

At 8% simple interest per annum a sum of money becomes Rs. 300 in 2.5 years. What was the sum invested?

If A is 50% more than B, then B is what percent of A?

If cos(A-B) - cos(A+B) = x, then the value of x is

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, select the odd word pair 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

If three successive discounts of 20%, 30% and 40% are given, then what will be the net discount (in percentage)?