What is so fragile that saying its name breaks it?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Find the number of squares in the below picture

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

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

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

why number 8549176320 is one of a kind?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

What is the next number in this matchsticks series riddle?