Quantitative Aptitude - Arithmetic Ability Questions

15% of 32 is

A sum becomes Rs 2286 in 3 years and Rs 2448 in 4 years at simple interest. What is the rate (in percentage) of interest per annum?

The ratio of present ages of R and S is 11:17. Before 11 years the ratio of their ages was 11:20. What is R's present age (in years)?

If a/(a+b) = 15/21, what is (a+b)/(a-b) is equal to?

What is the discount percentage offered on a book having marked price Rs 2150 being sold at Rs 1892?

In a 100 m race, A can give B 10 m and C 28 m. In the same race B can give C:

0.06% of 250% of 1600 is _________.

A and B started a partnership business investing in the ratio of 3 : 8. C joined them after 4 months with an amount equal to 3/4th of B. What was their profit (in Rs) at the end of the year if C got Rs 24,000 as his share?