What has one letter and starts with an E?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Count the number of lines in the image below ?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?