I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Count the Triangle in the figure given below:

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

I look at you, you look at me, I raise my right, you raise your left. What am I?

What does a man do only once in his lifetime, but women do once a year after they are 29?

No matter how little or how much you use me, you change me every month. What am I?

What's a single-digit number with no value?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?