Quantitative Aptitude - Arithmetic Ability Questions

Select the odd word/letters/number/number pair from the given alternatives.

If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?

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 side of an equilateral triangle is 8 cm. Find its area (in cm2).

What is the measure of an interior angle of a regular dodecagon?

In the following question, select the odd word from the given alternatives.

The order of rotational symmetry of a parallelogram is

An equilateral triangle has sides of 10 cm each. Find the ratio of in-radius to the circum-radius of the triangle.