1. Answer: Because the car is traveling backwards.

Answer: Because Kai drove the car backwards, he could not reach his destination anyhow.

2. Answer: because she ate beef noodles.

Answer: There is no beef in beef noodles, so you can't see the beef even though you are eating beef noodles.

3. Answer: feet.

Answer: When you put on socks, of course, you put your feet inside the socks first.

Similar brain teasers:

1.? Puzzle: Chu's birthday is on March 30th.

Riddle: March 30th of every year.

2.? Riddle: A bull plus a cow, guess three words?

Riddle: two cows.

3.? Riddle: Why does it mean that when a woman wears high heels, it means she is getting married soon?

Riddle: because walking slowly in high heels makes it easy for a man to catch up.