Which is heavier: a ton of bricks or a ton of feathers?

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

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Give it food and it will live; give it water and it will die.

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

Can you find a number that lies one third of the distance between 1/3 and 2/3?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?