Quantitative Aptitude - Arithmetic Ability Questions

What is the slope of the line 2x + 3y = 12?

Find the sum of the measures all the interior angles of a polygon having 12 sides.

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

n an alloy, lead and tin are in the ratio of 2 : 3. In the second alloy, the ratio of same elements is 3 : 4. If equal quantities of these two alloy are mixed to forma new alloy, then what will be the ratio of these two elements in the new alloy? 

Which of the following can't be the unit's digit of a perfect square?

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.

Find the odd one out.

Which of the following is a Pythagorean triplet?