How do people vote when they are away from their polling community?

When a person changes his residence, he needs to update the authorities and voter registration and then only he can cast his vote in the new location.

Explanation:

There is no concept of online voting therefore whenever a person is changing his or her residence, he is required to update the authorities regarding the same so that at the time of elections he can exercise his right to vote.

The polling place of an individual is based on his or her residential address and therefore he is required to cast vote at the assigned polling place. If a person cast his vote at any other polling place the n one which is assigned for him, his vote will not be counted.

81 is a composite number.