Quantitative Aptitude - Arithmetic Ability Questions

If 3x= 4y= 12, then z is equal to

The sum of three numbers is 162. If the ratio of the first number to the second number is 5 : 7 and that of the second number to the third number is 5 :3, then what is the second number?

If in the population of a town there is an increase of 44% in the first year and 75% in the second year, then what is the average rate of increase in the population?

Find the LCM of 3.2, 2.72, 1.28 and 1.44

D sells a table to E at a profit of 30% and E sells it to F at a loss of 30%. What is the ratio of cost prices of D and F?

In what time will a train, 60 metres long, running at the rate of 36 km/hr pass a telegraph post?

A right prism has a square base with side of base 4 cm and the height of prism is 9 cm. The prism is cut in three parts of equal heights by two planes parallel to its base. What is the ratio of the volume of the top, middle and the bottom part respectively?

The mean of 21 observations (all different) is 40. If each observation greater than the median is increased by 21, then the mean of observations will become: