Brain Teasers! 2.0

How can you lift any elephant with one hand?

What travels around the world but always stays in a corner?

Larry's father has 5 sons named Ten, Twenty, Thirty and Forty. What was is the fifth sons name.

what goes up and down but remains in the same place?

What can you lead up the stairs but not down?

How much dirt is there in a hole 3 feet deep, 6ft long and 4ft wide?

There was an airplane crash, every single person died yet two survived. How is this possible?

Some months have 31 days, some have 30 days. how many months have 28 days?

If it took 8 men 10 hours to build a wall, how long would it take 4 men to built the same wall?

Mr Doc gave you 3 pills and says to take one every 30 mins, how long till all pills are gone?