Quantitative Aptitude - Arithmetic Ability Questions

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?

In an ornament the ratio of gold and copper is 3:2. The percentage of gold in the ornament is:

Select the related number from the given alternatives.
0.02 : 0.002 :: 1/3 : ?

A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease?

Car B is running twice as fast as car A. If car A covers a distance of 90 km in 1 1/2 hrs, what is the speed of car B?

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

At what rate of compound interest per annum will a sum of Rs 50000 become Rs 73205 in 2 years?

If P = 7 + 4√3 and PQ = 1, then what is the value of (1/P2) + (1/Q2)?