Monday, March 10, 2008

Good but quick brainteasers

These are easy number problems, but if you try to answer them too quickly you'll probably make mistakes. They're fun to spring on friends.
1. How much is 1 times 2 times 3 times 4 times 5 times 6 times 7 times 8 times 9 times 0?
2. Divide 20 by 1/2 and add 3. What is the result?
3. How much does a brick weigh if it weighs 5 pounds plus half its own weight?
4. A farmer had 17 sheep. All but 9 died. How many were left?
5. How much is twice one half of 987,654,321?

3 comments:

Lydia said...

1 0
2 13
3 7/12 lbs
4 9
5 987654321

lekiM said...

Lydia, I think you got # 2 and 3 wrong. I'll go with
1. 0
2. 43
3. 10
4. 9
5. 987,654,321

lekiM

Della Hill said...

Mike is right. Well done.
-Della