Using Only Five 5's and any mathematical operator make sum as 37

Name a key which is hardest to turn.

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

You can see three almost identical images below. Can you spot the odd one out from them?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

What has hands, but can’t clap?

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?

Solve this riddle by finding the odd one out from the rest.