Quantitative Aptitude - Arithmetic Ability Questions

A man was 32 years of age when he had his first son. His wife was 35 years of age when his son attained the age of 7 years. The difference between the age of the father and the mother is _____

What is the rate of interest if simple interest earned on a certain sum for the 3rd year is Rs 1,750 and compound interest earned for 2 years is Rs 3622.5?

A bus travels 720 km in 20 hours. Calculate its average speed in meters/second.

A and B together do a job in 12 days and A could do the job in 20 days if he worked alone. How many days would B take to do the job if he worked alone?

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is:

If 17/3 + [3(2x - 5/3)]/2 = 1/6, then what is the value of x?

What is the simplified value of 18 - 12 ?

Determine the value of z in the equation: z = 20+20+20+20+...∞