Quantitative Aptitude - Arithmetic Ability Questions

A is twice as good as B and together they finish a piece of work in 16 days. The number of days taken by A alone to finish the work is

Vikram and Vivek can finish a work in 50 days. They worked together for 20 days and then left. How much work has been done by them?

If 3n = 2187, then the value of n is:

Calculate the value of 61681x61681-31681x3168130000

The ratio of speeds of X and Y is 5:7. Y covers a distance of 420 km in 3 hours. What is the speed of X?

A and B together can complete a piece of work in 12 days. They worked together for 5 days and then A alone finished the rest work in 14 days. A alone can complete the work in _____.

If 27N4 is divisible by 11, then what is the value of N?

P bought an article for Rs. 1600 and sold it at a profit of 10%. What would have been the increase in the profit percent if it was sold for Rs. 1840?