What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

What has lots of eyes, but can’t see?

Which number should replace the question mark?

Buy me, smell me or deliver me, I do not change.

Who am I?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

81 x 9 = 801. What must you do to make the this equation true?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?