Lame/Corny jokes

I got this from my cousin's blog. According to her bro, who's also my cousin (duh?!), he said it's from wu zhong xian. Trust him (wu zhong xian) to think of such lame jokes. haha..

Q: Why is 6 afraid of 7?
Ans: Because 7 ate 9 (7,8,9)

Q: Who is shorter? A or C?
Ans: A, because A 比 C 低 (ABCD)