Sillymeter!

Larry's father has five sons named ten, twenty, thirty and forty was is the fifth sons name

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

What can you lead up the stairs but not down?

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

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

If it took 8 men ten hours to build a wall, how long would it take 4 men to build it?

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

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

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