Logic Riddles

Question: 7 months have 31 days. How many months have 28 days?

Question: Who was buried in Grant's Tomb?

Question: Why is a raven like a writing desk?

Question: There are four men: Abe, Butch, Cam, and Dan. There are four hats: two white and two black. They each get a hat: Abe gets black, Butch gets white, Cam gets black, and Dan gets white. They don't know what hat color they have. Abe goes into a room so that no one can see his hat. The others line up in front of the door in the order Butch, Cam, and Dan (Butch can't see the others hats, Cam can see Butch's, and Dan can see Cam and Butch's hats). Whoever can figure out their hat color first wins $1,000. If they are wrong they are out of the running.

Which man can figure out his hat color without a doubt?

Question: A farmer has a ton of strange animals, but he has to sell one of them. He has a pig with two tails, a cow with two utters, a horse with two right hooves, and a chicken with only three toes on each foot.

To keep his livestock as weird as possible, what animal should he sell?