Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four number pairs are given. The number on left side of (–) is related to the number of 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.

Incentre of Δ ABC is I. ∠ABC = 90° and ∠ACB = 70°. ∠AIC is

The sum of digits of a two-digit number is 9. When the digits are reversed, the number decreases by 45. Find the changed number.

The number of students in a class is increased by 20% and the number now becomes 66. Initially the number was

In a mixture of 45 litres, the ratio of liquid A and liquid B is 7 : 2. If 11 litres of liquid B is added to the mixture, then what will be the ratio of liquid A and liquid B in the new mixture?

Of the 3 numbers whose average is 112, the first is 3/13 times the sum of other 2. The first number is _____.

What is the area (in square units) of the figure enclosed by the x-axis, the y-axis and the line x + 2y = 6 ?

If cot 135° = x, then the value of x is