Why did the Girl throw the butter out of the window?

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

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

What can you catch but never throw?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

When it is alive we sing, when it is dead we clap our hands. What is it?