Quantitative Aptitude - Arithmetic Ability Questions

A shopkeeper purchased 510 eggs at the rate of Rs. 20 per dozen. 30 eggs were broken on the way. In order to make a gain of 20%, he must sell the remaining eggs at the rate of

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

Average age of a team having 12 players is 23 years. If the age of the coach is also included, then the average age increases by 2 years. What is the age (inyears) of the coach?

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?

Chandan is 2 years older than Ankit but 1 year younger than Sumit. Ankit is twice as old as Khushboo. If Khushboo's age is 25 years, what is the age (in years) of Sumit?

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

If 2x + 6y = 3xy and 10x -­ 3y = 4xy, find x, y.

If (a + b)/c = 6/5 and (b + c)/a = 9/2, then what is the value of (a + c)/b?