Tuesday 13 October 2009

How many dogs does each child get?

17 Dogs?!

One day, Bob, a father with 3 children, wants to give his dogs to his children. He has 17 dogs...
Bob wants the first child to get 1/2 of his dogs.
Bob wants the second child to get 1/6 of his dogs.
Bob wants the last child to get 1/9 of his dogs.

How many dogs does each child get?

Remember, dogs can't be cut...

Give comments please...
Thank you, ^^

A Climbing Snail

I have a new brain teaser:


There's a snail which is at the bottom of a well. It wants to get out of the well.
The well is 30m tall. The snail can only climb in the morning. In the evening, the snail slips down.
Every time the snail climbs, the snail climbs for 3 m. Every time the snail slips down, it slips for 2m.

How long will it take the snail to get out of the well?

Tuesday 6 October 2009

What color did he wear?

Hi guys! This is a brain teaser about hats and colours.


The story:
There are 3 people who want to wear hats. Next to them, there was a box, and inside the box there were 3 black hats and 2 white hats. Their eyes were closed by a piece of cloth, and every person took the hat without knowing the colour of his own hat.

A few minutes later, they were lined up and the cloths were removed. There was only one rule for each person, that every person was allowed only to see the hat of the person/people in front of them. The 3rd person could see the hats of the 2 people in front of him, the 2nd person could see the hat of the 1st person, and the 1st person couldn't see any people's hats.

A friend of them came and asked them one by one:
He asked the 3rd person, "Do you know the colour of your hat?"
The 3rd person said no.
He asked the 2nd person, "Do you know the colour of your hat?"
The 2nd person also said no.
He asked the 1st person, who was the person who couldn't see any people's hats, "Do you know the colour of your hat?"
The 1st person said, "Yes"

The questions for you:
What was the colour of the 1st person's hat?
How did he know the colour of his hat?

Answer this by commenting on this post.

Good luck!