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

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Take one out and scratch my head, I am now black but once was red. What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

What has one eye, but can’t see?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?