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

What do you call a fish without an eye?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Using Only Five 5's and any mathematical operator make sum as 37

Using eight eights and addition only, can you make 1000?

The cream is heavier than Milk. True or False?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?