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

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

If you say my name, I will no longer exist. What am I?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

I am the fastest animal but cannot climb the tree. What am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?