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.

If 60/75 is equivalent to 4/x, then the value of x is

Which of the following pairs is NOT a pair of twin primes?

The point of the intersection of three medians is known as the ____________.

If selling price and cost price of an article are Rs. 684.25 and Rs. 595 respectively, then what is the profit percentage?

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?

A well of diameter 3 m and depth 14 m is dug. The earth, taken out of it, has been evenly spread all around it in the shape of a circular ring of width 4 m to form an embankment. Find the height of embankment?

Which of the following fractions is largest?