Complete the table series riddle by finding the number that can replace "??".

A tourist visits a small town for his research. While in the town, he decides to get a haircut. Since the town is quite small, there are only two barbers in the town � one on the North Street and one on the South Street. The barbershop on the North Street is a mess and the barber has a weird and pathetic haircut. While the barbershop at the South Street is pretty tidy and the barber as well has an impressive haircut.

Which barbershop will the tourist visit for his haircut and why?

Prove that twice of ten is the same as twice of eleven.

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

There are forty elephants and they have forty-fore heads. How can this be possible?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?