What has one letter and starts with an E?

If six children and two dogs were under an umbrella, how come none of them got wet?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

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?

What you cannot hold but it is yours?

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

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

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

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