Santa's Helpers Riddle
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Santa And Duck Riddle
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Calling Santa Riddle
Hint:
Santas Suit Riddle
Hint:
Santa Money Riddle
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Santa And His Reindeer Riddle
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Laundry Detergent Santa Riddle
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
2 Fathers And 2 Sons Riddle
Two fathers and two sons sat down to eat eggs for breakfast. They ate exactly three eggs, each person had an egg. The riddle is for you to explain how?
Hint:
One of the 'fathers' is also a grandfather. Therefore the other father is both a son and a father to the grandson.
In other words, the one father is both a son and a father. Did you answer this riddle correctly?
YES NO
In other words, the one father is both a son and a father. Did you answer this riddle correctly?
YES NO
Santa And A Space Ship
Hint:
Hobbit Brain Teaser Riddle
Anyone whos gotten lost in Middle Earth knows that J.R.R. Tolkien loved a logic puzzle. The riddle competition between Bilbo Baggins and Gollum in The Hobbit serves up the trickiest riddle of which is:
Voiceless it cries,
Wingless flutters,
Toothless bites,
Mouthless mutters?
Voiceless it cries,
Wingless flutters,
Toothless bites,
Mouthless mutters?
Hint:
Train Smoke Riddle
An electric train is going south at 98 mph. the wind is blowing northeast. Which direction is the smoke blowing?
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The Nonstop Trains Riddle
A nonstop train leaves Moscow for Leningrad at 60 mph. Another nonstop train leaves leningrad for Moscow at 40 mph. How far apart are the trains 1 hour before they pass each other?
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Two Trains Riddle
Two incredibly high speed trains are charging at a speed of 250 mph, on the same track, starting from opposite directions. They leave at the same exact time and continue at the same exact speed. They never slow down. The two trains never touch...how is that possible?
Hint:
The two trains begin back-to-back and charge the track away from each other. Did you answer this riddle correctly?
YES NO
YES NO
A Riddle About Transport
Here is a riddle about transport
So it is time to use your brain
This has an engine and carriages
And runs on rails it's a_______?
So it is time to use your brain
This has an engine and carriages
And runs on rails it's a_______?
Hint:
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