Quantitative Aptitude - Arithmetic Ability Questions

Which one among the following does not belong to the group?

What will be the average of the first 5 positive even numbers divisible by 9?

If a - b = -1 and ab = 6, then what is the value of a3- b3?

Common factor of 24b6c8d2, 18a6c2d4, 12a4b4 is

The least number that must be subtracted from 1294 so that the remainder when divided by 9, 11, 13 will leave in each case the same remainder 6 is:

A cone is hollowed out of a solid wooden cube of side 7 cm. The diameter and height of the cone is same as the side of the cube. What is the volume of the remaining cube?

Mummy can bake 75 cakes in 15 hours, Mummy and Sister together can bake 120 cakes in 20 hours. How many cakes Sister can bake in 30 hours?

30 men can do a piece of work in 16 days working 8 hrs a day. How many men are needed to complete another work, which is twice the first one, in 10 days working 12 hrs a day?

The following are the steps involved in solving the above problem. Arrange them in sequential order.