Quantitative Aptitude - Arithmetic Ability Questions

Which of the following numbers is not a prime number?

From the top of a platform 5 m high, the angle of elevation of a tower was 30 deg. If the platform was positioned 40√3 m away from the tower, how tall was the tower?

In which of the following quadrilaterals only one pair of opposite angles is supplementary?

How many of the factors of 256 are perfect squares?

The volume of a hemisphere is 5749.33 cm³. Find its diameter (in cm).

The sum of two fractions is 3/4. One of them is 2/3. What is the other fraction?

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.

 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.