Some Math Logic Puzzles

A correct answer gets you a trophy. Message me or use the comments. First poster gets the correct answer, all later answers will not be counted.

1. There are 27 sheep held in 4 sheep pens. Each pen has an odd number of sheep. How is this possible?

2. Which weighs more, a pound of feathers or a pound of gold?

3. 3 identical blocks of wood are being held by different people in different places. When released, one block of wood goes upwards, one block goes downwards, and one block stays the same. How is this possible?

Have fun!