Quantitative Aptitude - Arithmetic Ability Questions

Simple interest on a sum for 5 years is equal to 20% of the principal. In how many years interest will be equal to the principal?

If 4x - 7y = 3 and 2x - y = 9, then x - y is.

If 31x + 31y = 403, then what is the average of x and y?

Find the unit place in 194102+294103

Curved surface area of a cylinder is 528 sq cm. If circumference of its base is 44 cm, find the height of the cylinder?

The 5th and 9th term of an arithmetic progression are 7 and 13 respectively. What is the 15th term?

If the numbers  93, 204, 256 are arranged in ascending order, then the right arrangement is 

If two flood gates A and B function simultaneously, the reservoir will be filled iu 6 hours. Gate A fills the reservoir 5 hours faster than gate B. How many hours does the faster flood gate take to fill the reservoir?