What does this rebus puzzle means ?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

Can you identify the famous TV character from the rebus below?

There is something which is always coming but never arrives?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Solve the following series:
AZ, GT, MN, __, YB

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Find out the missing number in the picture attached:

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Can you solve the below tricky visual equation?