How can you make number one disappear by adding something to it?

There is something which you can be arrested for attempting but not for successfully completing.

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

What has one eye, but can’t see?

What can go through glass without breaking it?

Two friends were stuck in a cottage. They had nothing to do and thus they started playing cards. Suddenly the power went off and Friend 1 inverted the position of 15 cards in the normal deck of 52 cards and shuffled it. Now he asked Friend 2 to divide the cards into two piles (need not be equal) with equal number of cards facing up. The room was quite dark and Friend 2 could not see the cards. He thinks for a while and then divides the cards in two piles.

On checking, the count of cards facing up is same in both the piles. How could Friend 2 have done it ?

Can you solve the below geography rebus by decoding the below rebus ?

Can you find out the number that should replace the question mark with a valid reason?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?