Quantitative Aptitude - Arithmetic Ability Questions

Select the related word/letters/number from the given alternatives.
1 : 8 :: ? :64

Among three numbers, the first is twice the second and thrice the third, If the average of three numbers is 517, then what is the difference between the first and the third number?

A can do a piece of work in 8 days and B can do it in 10 days seperately. How many days would it take for both A and B to finish the same work together?

In simple interest rate per annum a certain sum amounts to Rs. 5,182 in 2 years and Rs. 5,832 in 3 years. The principal in rupees is

If 2(5x - ­4) -­ 2 < 2x ­- 1 < 4x - ­2; then the value of x is

In how many years will Rs 25,000 yield Rs 8,275 as compound interest at 10% per annum compounded annually?

A sum of Rs 10000 becomes Rs 14641 when invested at compound interest at the yearly interest rate of 20% per annum. If the compounding is done half yearly, then for how many years was the sum invested?

If tanA + tanB = X, then the value of X is