Teacher ask the student

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

what did student replied ?

What has many keys but can’t open a single lock?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

What does this rebus means ?

PROG WORKRESS

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?