Quantitative Aptitude - Arithmetic Ability Questions

The shadow of a tower on ground level is increased by 30 m, when the angle of depression by the sun changes from 60 deg to 30 deg. The height of the tower is

How much does one need to add to 4/5 to obtain 5/4?

Which of the following numbers is a prime number?

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the

Simplify 4(x-1) -3x

____ are twin prime numbers.

In a right angled triangle, the hypotenuse is 4 cm longer than the perpendicular which is 4 cm longer than the base. Calculate the length of hypotenuse.

Which is the correct ascending order of the given numbers?