brain teasers

1. the word contains six letters,remove one letter and 12 remain
4. no matter how little or how much you use me, you change me every month
8. in a cross country race,just before crossing the finish line you overtake the person in second place. in what place do you finish
9. take me out and scratch my head to turn me black from red
11. always in front of you but cannot be seen
14. it has a mouth but cannot eat, has a bank but no money
15. it stalks the countryside with ears that cannot hear
17. in a year there are 7 months having 31 days.How many months have 28 days
18. never asks questions but is often answered
19. i can be short and sometimes hot but rarely impress when displayed
20. if you have me, you want to share me.if you share me you haven't got me.what am i
21. what gets wetter and wetter the more it dries

1. the more of this there is, the less you see.
2. i have 4 wings but cannot fly,on the same spot I am always found, toiling away with a little sound
3. if red house is made from red bricks, what is greenhouse made from
5. i am worthless to one, priceless to two and stolen with a glance
6. my voice is tender and waist is slender,and I am invited to play.wherever I go I must take my bow or else i have nothing to say
7. although i am made from water yet i die when put in water
9. i have cities but no houses, have forests but no trees have water but no fish
10. i am tall when young but short when i get old
12. until I am measured I am not known, yet I am missed when i have flown
13. what can be swallowed but it can also swallow you
16. what is harder to catch, the faster you run