What word does this rebus represent?

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Can you replace the question mark with the correct number in the below table sequence?

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?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

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

Which is heavier: a ton of bricks or a ton of feathers?

If your uncle’s sister is not your aunt, what relation is she to you?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

Prove that the below maths equation is true.

8 + 8 = 91

What's the only room from which no one can enter or leave