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

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

What jumps when it walks and sits when it stands?

What have one eye but still cannot see?

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?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

I make two people out of one. What am I?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Can you solve this picture maths equation?