Quantitative Aptitude - Arithmetic Ability Questions

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

If the amount received at 10% per annum Compound interest after 3 yrs is Rs 19965, then what will have been the principal (in Rs) amount?

A's salary was decreased by 50% and subsequently increased by 50%. How much percent does he lose?

The sum of 2xy(3x + 4y - 5z) and 5yz(2x - 3y) is

A Village lost 12% of its goats in a flood and 5% of remainder died from diseases. If the number left now is 8360. What was the orignal number before the flood?

Given: 6x + 2(6-x) > 2x -2 < 5x/2 - 3x/4; then x can take which of the following values?

A solid right circular cone of radius 4 cm and height 7 cm is put inside a cylindrical vessel of radius 5 cm and height 8 cm. How much water in cubic cm will be required to fill the cylindrical vessel completely?

If a3+1a3 = 2, then the value of a2+1a?