Riddles

1. A barrel of water weighs 20 pounds. What must you add to it to make it weigh 12 pounds?
ans:holes
2.What goes up and down stairs without moving?
ans:carpet
3.Four jolly men sat down to play, And played all night till the break of day. They played for cash and not for fun, With a separate score for every one. When it came time to square accounts, They all had made quite fair amounts. Now, not one has lost and all have gained, Tell me, now, this can you explain?
ans:four men in a dance band