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

You see me once in June, twice in November, and not at all in May. What am I?

A man plots the murder of his wife. His plan is full proof. Nobody saw them leaving their house. He stabbed her with a knife while driving. She died on the spot. He threw her body in a valley. He threw the knife carefully wiping his finger prints on a random garbage bin. Then he went back to his home and no one was watching him this time as well.

After an hour, he was called by the local police department who informed him that his wife was murdered. They asked him to reach the scene of crime immediately. But as soon as he arrived at the crime scene, he was arrested by them.

How did the police know that he himself is the murderer?

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?