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

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Can you decipher the below rebus?

PBLUESAISNUERSES

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

What do you get if you add 2 to 100 four times?