Kids Riddles

Question: I have all of your knowledge but could fit in your hands.

What am I?

Question: Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation.

Note: Each must be used exactly once and no other numbers or symbols can be used.

Question: If you have an 11 minute and 13 minute hourglass, how can you accurately time 15 minutes?

Question: No matter how much rain comes down on it it won't get any wetter.

What is it?

Question: There are two planes. One is going from New York to London at a speed of 600 MPH. The other is traveling from London to New York at a speed of 500 MPH.

When the planes meet which one will be closer to London?