Quantitative Aptitude - Arithmetic Ability Questions

If A is 6 times more than B, then by what percentage is B is less than A?

How many job applicants had applied if the ratio of selected to unselected was 19:17. If 1,200 less had applied and 800 less selected, then the ratio of selected to unselected would have been 1:1.

To travel 708 km, an Express train takes 6 hours more than Rajdhani train. If however, the speed of the Express train is doubled, it takes 3 hours less than Rajdhani train. What is the speed of Rajdhani train?

M is thrice as good as workman as N and together they finish a piece of work in 30 days. In how many days will M alone finish the work?

Ratio of A's age to B's age is 4:3. 'A' will be 26 years old after 6 years. The age of B now is

Ashok can row upstream at 8 kmph and downstream at 12kmph.What is the speed of the stream ?

Prabhat has done 1/2 of a job in 12 days. Santosh completes the rest of the job in 6 days. In how many days can they together do the job?

Amar can complete a work in 30 days and Raman can complete the same work in 15 days. If both of them work together, then in 4 days what percent of the total work will be completed?