Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

How can you leave a room with two legs and return with six legs?

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

A couple went on a climbing trip. But only the husband returned from the vacation and said that his wife slipped off while climbing and died. On investigating, the local sheriff arrested him saying, 'Your travel agent called. You murdered your wife.'

The man did not inform anyone about the trip. Then how was the agent so sure that it was a murder?

What has no start, end, or centre?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?