Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 36+729381+643

When 0.090909.....is converted into a fraction, then the result is

What should be the average speed of a car to cover a distance of 189 km in 3.5 hours?

A car travels a certain distance at 70 km/h and comes back at 30 km/h. Find the average speed for total journey.

Manish is four times as efficient as Puneet. Manish takes 90 days less than Puneet to complete a book. If both of them work together, then in how many days the book will be completed?

If tan A = 1/2 and tan B = 1/3, then what is the value of tan (2A + B)?

What is the value of 34+122 ?

If the radius of a circle is increased by 21%, then its area will increase by what percent?