Here 40 matches are arranged to form 30 squares ( 16 small , 9 big , 4 bigger and 1 biggest ). Now can you remove 9 matchstick so that no square remain.

The distance between centres of two circles having radius 5 cm each is 10 cm. Suprisingly these two circles don't touch each other. How is this possible?

You have 16 chocolates and you want to share it equally with your three friends. How will you share and how much will each get?
(Note : You cannot throw any chocolate away or divide the chocolate in half or one third)

Take 45 away from 45 and leave 45 as remainder. If you think it is impossible then think once again. Here is one way
987654321 = 45
-123456789 = 45
--------------------------
864197532 = 45
Using the same system, can you find another way?