Quantitative Aptitude - Arithmetic Ability Questions

26% of a number is 65. What is the number?

The average of 100 observations was calculated as 35.It was found later, that one of the observation was misread as 83 instead of 53. The correct average is :

√[(1 ­ sinA)/(1 + sinA)] is equal to?

If x2+1x2 = 98, then x3+1x3 = ?

Mukesh got series of discount 30%, 25%, 15% on his shirt. Find out the single equivalent discount.

Find the 4th proportional to 9, 17 and 27.

The shadow of a tower when the angle of elevation of the sun is 45°, is found to be 10 m longer than when it was 60° . The height of the tower is

If the difference between the compound interest and the simple interest on a certain sum at the rate of 5% per annum for 2 years is Rs. 20, then the sum is