brain food（脑筋急转弯）

brain food（脑筋急转弯）
1.I have two U.S.coins that add up to fifty-five cents.One is not a nickel.What coins are they?
2.A man was born in 1964 and died in 1984 at zhe age of 25.How is this possible?
3.Forward I'm heavy,backwards I'm not.What am
4.What two words have the most letters in it?
5.While on my way to St.Ives,
I met a man with seven wives.
Each wife had seven sacks;
Each sack had seven cats;
Each cat had seven kittens.
Kittens,cats,sacks,wives;
How many were going to St.Ives?
6.If a boy and a half can eat a hot dog and a half in a minute and a half,how long wouldit take six boys to eat six hot dogs?
7.A man lives in a house with four walls has a window.Each window has a southern exposure.A bear walks by.What color is the bear?
8.How long is the answer to this question?
9.Divide 30 by 1/2 and add 10.What is the answer?