If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Solve below rebus puzzle?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

How is a fly different from a mosquito?

Prove that the below maths equation is true.

8 + 8 = 91

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

I have branches, but no fruit, trunk or leaves. What am I?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?