Quantitative Aptitude - Arithmetic Ability Questions

What is the sum of the measures of all the interior angles of a regular polygon of 9 sides?

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.

From the top of a platform 7 m high, the angle of elevation of a tower was 30 deg. If the platform was positioned 50√3 m away from the tower, how tall was the tower?

Factors of  x2 + 7x + 10 are

 Find the volume (in cm3) of a hemisphere of diameter 42 cm.

The total surface area of a cube is 181.5 cm². Find its side (in cm).

Find the greatest number which on dividing 391 and 318 leaves remainders 7 and 6 respectively.

Calculate the value of ∡OBC + ∡BAC, if O is the circum-center of the triangle ABC inscribed in the circle.