Here are some brain teasers to try on your own:
(find these and more at brainsmashers.com and mindchallenge.com)
 
 

1. How many gifts, in total, did I receive during the Twelve Days of Christmas - according to the song?

2. If Mark, Ava, Cathy, John, Brian and Ken like chocolate and Norman, Stan, Tim,
Yohan do not, does Quin like chocolate? 

3. I was walking down Mulberry Lane,
I met a man doing the same.
He tipped his hat and drew his cane,
And in this rhyme I said his name. 

4. What word most logically goes in the brackets: 

5. A trout's tail weighs eight pounds. Its head weighs as much as the tail and one-half of the body combined, and the body weighs as much as the head and tail combined. What does the whole trout weigh? 

6. My electronic world atlas has developed a fault, I did a listing of miles from England to particular countries and here is the result: 

7. A rich old Arab has three sons. When he died, he willed his 17 camels to the sons, to be divided as follows: First Son to get 1/2 of the camels Second Son to get 1/3rd of the camels Third Son to get 1/9th of the camels. The sons are sitting there trying to figure out how this can possibly be done, when a very old wise man goes riding by. They stop him and ask him to help them solve their problem. Without hesitation he divides the camels properly and continues riding on his way. How did he do it? 

8. You have a barrel, filled to the top with water, which weighs 150 pounds. What can you add to the barrel in order to make it lighter? 

9. A race car driver is going to take 2 laps around a one-mile track (2 miles total). He does the first lap at 30 mph. How fast does he have to go in the second lap to average 60 mph for the total trip?

10. Can you place ten coins into 5 rows, with each row containing 4 coins, without placing any coin on top of another coin?