What word begins and ends with an E, but has only one letter?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

Before Mount Everest was discovered, what was the highest mountain in the world?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Do You See It?

How many times can you subtract the number 5 from 25?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?