Quantitative Aptitude - Arithmetic Ability Questions

What is the value of (3/5 + 7/9)?

If cos 135° = x, then the value of x is

The length of one side of a rhombus is 13 cm and one of the diagonals is 10 cm. What is the legth of the other diagonal?

Vishal is 20 years younger to Arya. Twelve years hence Arya's age will be 1.25 times that of Vishal. Aryais now ......... years old.

Find the total surface area (in cm2 ) of a hemisphere of diameter 42 cm.

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 9% per annum is Rs 405. The sum is ______ .

What is the average of 90, 250, 240, 204, and 616?

There are two numbers such that the first number is half of the second number. If their average is 57, then what is the first number?