Quantitative Aptitude - Arithmetic Ability Questions

At 10% discount the selling price of a toaster is Rs 18000, what is the selling price if the discount is 37.5%?

Tom's father is thrice as old as Tom. 10 years ago Tom's father's age was 7 times his age. What is Tom's current age? 

Parimal has done 1/4th of a job in 10 days, Salim completes the rest of the job in 20 days. In how many days can they together do the job?

What is the compound interest (in Rs) for 1 year on a sum of Rs 20000 at the rate of 40% per annum compounding half yearly?

60% of P = 50% of Q and Q = x% of P. What is the value of x?

What is the rate of interest (in %) if simple interest earned on a certain sum for the 3rd year is Rs 2,000 and compound interest earned in 2 years is Rs 4,160?

The sum of all prime numbers between 58 and 68 is

A spaceship travels at 1,260 km/h. How many metres does it travel in 1/10 th of a second?