Quantitative Aptitude - Arithmetic Ability Questions

A car travels a certain distance at 34 km/h and comes back at 66 km/h. What is the average speed for total journey?

A sum becomes Rs 8800 in 4 years at simple interest at the yearly interest rate of 25% per annum. What is the sum (in Rs)?

Which one of the following is the minimum value of the sum of two integers whose product is 24?

What is the average of first 30 multiples of 9?

The difference between the ages of two sisters is 4 years when father's age is 54. Father is elder by 2 years to mother . Younger sister's age is half of mother's age. Find the age of elder sister.

If 3+12=x+3y, then the x+y is 

If x – 4y = 0 and x + 2y = 24, then what is the value of (2x + 3y)/(2x – 3y)?

If a + b = 8 and ab =15, then a3 + b3 is