Quantitative Aptitude - Arithmetic Ability Questions

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.

Average of 31 numbers is 19. If the average of first 8 numbers is 24, then what is the average of the remaining numbers?

What number, from the following should be deducted from 1184 to make it exactly divisible by 21?

If a+1a=1,then the value of a2-a+1a2+a+1 is a≠0

The height of a tower is 50√3 m. The angle of elevation of a tower from a distance 50 m from its feet is

If in a two digit number, the digit at unit place is y and the digit at tens place is 5, then the number is

cos(A+B) + cos(A-B) is equal to

A man engaged a servant on a condition that he would pay him Rs. 80 and a pair of jeans after service of one year. Servant served for only 9 months and receives a pair of jeans and an amount of Rs. 55. The price of the jeans is ________.