Good Riddles

Question: Two men are in a desert. They both have packs on. One of them is dead. The other man has his pack open, and the man who is dead has his pack closed.

What is in the pack?

Question: What word doesn't belong in this group? That, hat, what, mat, cat, sat, pat, or chat?

Question: Countless blades that bend with a touch,
exploited by kids who want to make a buck.

What am I?

Question: There are 4 light bulbs in a room and 4 switches corresponding to these four light bulbs (in a random order). You cannot see the light bulbs from where the switches are.

If you can only visit the room with the light bulbs once, how can you figure out which switch belongs to which light bulb?

Question: What has four legs and can't walk?