What has one letter and starts with an E?

During which month do people sleep the least?

I don't get anymore wetter, no matter how much rain falls on me.

Can you write down eight eights so that they add up to one thousand?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Can you solve this picture maths equation?

Can you find the missing piece of the Porsche?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?