I am essential to life on earth! I am split into thirds. Two thirds are the same. One of the thirds is 8. The other two are 1 each. What am I ?
It's Water. It was obvious when you mentioned that it was essential to life.
WATER is the answer
100 coins are lying flat on a table. 10 of them are heads up and 90 are tails up. How can you split the coins into two piles such that there are same number of heads up in each pile?
A barman is having a 12 liters jug full of beer. He needs to divide or split that beer into two equal parts. All he has is two empty jugs of capacity 8 liters and 5 liters.
I am the end of life but also the start of Earth. I wait in the middle of the ocean but not there in the bank. I stay very close to the beginning of the Death. I am able to enter in the Heaven but also there in the midst of the Hell. Who am I ?