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.

8 x {5 - (-2) x (-3)} = ?

If X = 423 + 32 then find the value of  ( X + 1X ).

If the measure of the interior angle of a regular polygon is 120 deg then how many sides does it have?

23 x 31 = 713. How much is 0.0713 / 3.1?

If the edge of a cube is increased by 2 cm, the volume will increase by 488 cub.cm. What then will be the length of each edge of the cube?

What is the slope of the line perpendicular to the line passing through the points (­6,3) and (2,7)?

Find the value of 0.0112 - 0.0012 of 0.14 + 0.25 × 0.20.02 × 0.01