Quantitative Aptitude - Arithmetic Ability Questions

What is the average of all numbers between 9 and 90 which are divisible by 8?

The value of sinθ1+cosθ + sinθ1-cosθ

If a3 + b3 = 19 and ab = -6 , then what is the value of a + b?

What is the difference between 0.6 and 0.6%?

If a sum of Rs.12500 is invested for 1 year at 12% per annum interest being compounded semi­-annually, then interest earned is

The compound interest earned in two years at 12% per annum is Rs 10176. What is the sum (in Rs) invested?

A loan of Rs. 305 was taken at a certain rate per annum of compound interest, for 3 years. After 3 years the amount repaid was Rs. 670, calculate the rate of compound interest.

What is the effective discount on two successive discounts of 20% and 25%?