Quantitative Aptitude - Arithmetic Ability Questions

If a - b = 2 and ab = 8, then what is the value of a3 - b3?

A man covered a certain distance by a train running at the speed of 50 km/hr and covers the same distance back by walking at the speed of 5 km/hr. Ifthe whole journey took 5 hours 30 minutes, then what was the distance (in km) of one side?

Working 5 hours a day, Shivam can read a book in 24 days. How many hours a day should he work so as to finish the same work in 8 days?

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.

If rsin∅ =1, rcos∅=√3, then the value of r2tan∅ is

The sum of present age of father and his son is 60 yrs. Six years ago, father's age was five times the age of the son. After 6 years, son's age will be?

There is 40% increase in an amount in 10 years at simple interest. What will be the compound interest of Rs 25000 after 2 years at the same rate?

Select the odd number from the given alternatives.