A Book In A Bar Riddle
Hint:
A Book Everyone Can Have Riddle
What book was once owned by only the wealthy, but now everyone can have it? You can't buy it in a bookstore or take it from the library.
Hint:
Judging Books Riddle
Hint:
Unhappy Books Riddle
Hint:
Unhappy Physics Book Riddle
Hint:
Cat Books Riddle
Hint:
Finding Books Riddle
Hint:
Rising Above The Din
My voice rises above the din, sometimes catching all unaware. I never ask questions, yet get many answers.
What am I?
What am I?
Hint:
A Lot Of Sand
Im going to give you a riddle
So lets see if you can answer this
What has little rain and a lot of sand
Where youd want to see an oasis?
So lets see if you can answer this
What has little rain and a lot of sand
Where youd want to see an oasis?
Hint:
The Secret Santa Exchange
A group of ten friends decide to exchange gifts as secret Santas. Each person writes his or her name on a piece of paper and puts it in a hat. Then each person randomly draws a name from the hat to determine who has him as his or her secret Santa. The secret Santa then makes a gift for the person whose name he drew.
When it's time to exchange presents, each person walks over to the person he made the gift for and holds his or her left hand in his right hand.
What is the probability that the 10 friends holding hands form a single continuous circle?
When it's time to exchange presents, each person walks over to the person he made the gift for and holds his or her left hand in his right hand.
What is the probability that the 10 friends holding hands form a single continuous circle?
Hint: It's not as difficult as it seems.
It's the number of ways the friends can form a circle divided by the number of ways the names can be drawn out of the hat.
1/10
For a group of n friends, there are n! (n factorial) ways to draw the names out of the hat. Since a circle does not have a beginning and end, choose one person as the beginning and end of the circle. There are now (n-1)! ways to distribute the remaining people around the circle. Thus the probability of forming a single circle is
(n-1)! / n!
Since n! = (n-1)! * n (for n > 1), this can be rewritten as
(n-1)! / (n*(n-1)!)
Factoring out the (n-1)! from the numerator and denominator leaves
1/n
as the probability. Did you answer this riddle correctly?
YES NO
For a group of n friends, there are n! (n factorial) ways to draw the names out of the hat. Since a circle does not have a beginning and end, choose one person as the beginning and end of the circle. There are now (n-1)! ways to distribute the remaining people around the circle. Thus the probability of forming a single circle is
(n-1)! / n!
Since n! = (n-1)! * n (for n > 1), this can be rewritten as
(n-1)! / (n*(n-1)!)
Factoring out the (n-1)! from the numerator and denominator leaves
1/n
as the probability. Did you answer this riddle correctly?
YES NO
The Sad Math Book
Hint:
Books In The Ocean Riddle
Hint:
Stole From The Bookstore Riddle
Hint:
Book In An Emergency Room Riddle
Hint:
The Wall Say To The Bookcase Riddle
Hint:
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