If 21x = 79x, what is the value of x?

They are three errirs in this question. Can you find them?

Which wheel of car does not rotate when you turn your car right?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What is at the end of a rainbow?

How can a man go eight days without sleep?

What is both possible and impossible at the same time?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?