How can you write nineteen in a manner that if we take out one, it becomes twenty?

Solve below rebus puzzle?

What does this Rebus Picture mean?

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?

When it is alive we sing, when it is dead we clap our hands. What is it?

Identify the hidden meaning behind this picture?

Solve the following series:
AZ, GT, MN, __, YB

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?