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

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

You need to move three matchsticks to form three squares. Can you do it?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What does the below image rebus riddle means ?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?