The Coin Toss Riddle
You are in a bar having a drink with an old friend when he proposes a wager.
"Want to play a game?" he asks.
"Sure, why not?" you reply.
"Ok, here's how it works. You choose three possible outcomes of a coin toss, either HHH, TTT, HHT or whatever. I will do likewise. I will then start flipping the coin continuously until either one of our combinations comes up. The person whose combination comes up first is the winner. And to prove I'm not the cheating little weasel you're always making me out to be, I'll even let you go first so you have more combinations to choose from. So how about it? Is $10.00 a fair bet?"
You know that your friend is a skilled trickster and usually has a trick or two up his sleeve but maybe he's being honest this time. Maybe this is a fair bet. While you try and think of which combination is most likely to come up first, you suddenly hit upon a strategy which will be immensely beneficial to you. What is it?
"Want to play a game?" he asks.
"Sure, why not?" you reply.
"Ok, here's how it works. You choose three possible outcomes of a coin toss, either HHH, TTT, HHT or whatever. I will do likewise. I will then start flipping the coin continuously until either one of our combinations comes up. The person whose combination comes up first is the winner. And to prove I'm not the cheating little weasel you're always making me out to be, I'll even let you go first so you have more combinations to choose from. So how about it? Is $10.00 a fair bet?"
You know that your friend is a skilled trickster and usually has a trick or two up his sleeve but maybe he's being honest this time. Maybe this is a fair bet. While you try and think of which combination is most likely to come up first, you suddenly hit upon a strategy which will be immensely beneficial to you. What is it?
Hint: Think what would be most likely to happen if you chose HHH, would this be a good decision?
The answer is to let your friend go first. This puzzle is based on an old game/scam called Penny Ante. No matter what you picked, your friend would be able to come up with a combination which would be more likely to beat yours. For example, if you were to choose HHH, then unless HHH was the first combination to come up you would eventually lose since as soon as a Tails came up, the combination THH would inevitably come up before HHH. The basic formula you can use for working out which combination you should choose is as follows. Simply take his combination (eg. HHT) take the last term in his combination, put it at the front (in this case making THH) and your combination will be more likely to come up first. Try it on your friends! Did you answer this riddle correctly?
YES NO
YES NO
The Prime Number Riddle
Two hundred people in an auditorium are asked to think of a single digit number from 1 to 9 inclusive and write it down. All those who wrote down a prime number are now asked to leave. Ninety people remain behind in the hall. How many of these are expected to have written down an odd number?
Hint: Remember that 1 is not a prime number.
Those that remain behind must have written {1,4,6,8,9} and from this only {1,9} are odd. The probability of an odd number is thus 2/5.
Expected number of odds is 2/5 * 90 = 36 Did you answer this riddle correctly?
YES NO
Expected number of odds is 2/5 * 90 = 36 Did you answer this riddle correctly?
YES NO
Above A Door Riddle
Hint:
A Tasty Treat
Open this everyday
For something that cant be beat
Behind each of the doors
You will find a tasty treat
What is it?
For something that cant be beat
Behind each of the doors
You will find a tasty treat
What is it?
Hint:
Babies And Basketball Riddle
Hint:
Hulk In The Garden
Hint:
Two Identical Soldiers
There are two identical soldiers each one is exactly the same. One however is a traitor. So one goes into a tank and the other goes on foot. The traitor succeeds in killing the army. Which one is the traitor?
Hint:
The one that went on foot is because it takes more than one soldier to operate a tank. Did you answer this riddle correctly?
YES NO
YES NO
Between An Elephant's Toes Riddle
Hint:
Known For Having Pointy Ears
We are known for having pointy ears
And for making Christmas toys
Which are delivered by Santa to
All of the good girls and boys
We are?
And for making Christmas toys
Which are delivered by Santa to
All of the good girls and boys
We are?
Hint:
A Sharpshooter Riddle
A sharpshooter hangs up his hat, turns around and walks 5000 meters, then turns around and shoots his gun, putting a hole right through his hat. How did he do it?
Hint:
Silver Tears Riddle
Silver tears falling down,
Natures clear imposter,
Sparkling, shining like a gown,
Adorn an elephant or horse,
Silver, PVC or even lead,
Bringing cheer to all around,
For such a simple thread.
What are these silver tears?
Natures clear imposter,
Sparkling, shining like a gown,
Adorn an elephant or horse,
Silver, PVC or even lead,
Bringing cheer to all around,
For such a simple thread.
What are these silver tears?
Hint:
Tinsel.
Tinsel emulates icicles, which are like tears and are clear in nature. Tinsel sparkles and shines, and is used to adorn elephants and horses in India. Tinsel is made from silver, PVC and was once made from lead. Tinsel brings back fond memories to many (including myself) and represents far more than a simple metallic thread would normally warrant. Did you answer this riddle correctly?
YES NO
Tinsel emulates icicles, which are like tears and are clear in nature. Tinsel sparkles and shines, and is used to adorn elephants and horses in India. Tinsel is made from silver, PVC and was once made from lead. Tinsel brings back fond memories to many (including myself) and represents far more than a simple metallic thread would normally warrant. Did you answer this riddle correctly?
YES NO
I Exist Where There Is Light Riddle
Hint:
How Many Triangles Are There?
Hint: Don't forget to count the outside :)
Age Of Three Daughters Riddles
I was visiting a friend one evening and remembered that he had three daughters. I asked him how old they were. The product of their ages is 72, he answered. Quizzically, I asked, Is there anything else you can tell me? Yes, he replied, the sum of their ages is equal to the number of my house. I stepped outside to see what the house number was. Upon returning inside, I said to my host, Im sorry, but I still cant figure out their ages. He responded apologetically, Im sorry, I forgot to mention that my oldest daughter likes strawberry shortcake. With this information, I was able to determine all three of their ages. How old is each daughter?
Hint:
3, 3, and 8. The only groups of 3 factors of 72 to have non-unique sums are 2 6 6 and 3 3 8 (with a sum of 14). The rest have unique sums:
2 + 2 + 18 = 22
2 + 3 + 12 = 18
2 + 4 + 9 = 15
3 + 4 + 6 = 13
The house number alone would have identified any of these groups. Since more information was required, we know the sum left the answer unknown. The presence of a single oldest child eliminates 2 6 6, leaving 3 3 8 as the only possible answer. Did you answer this riddle correctly?
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2 + 2 + 18 = 22
2 + 3 + 12 = 18
2 + 4 + 9 = 15
3 + 4 + 6 = 13
The house number alone would have identified any of these groups. Since more information was required, we know the sum left the answer unknown. The presence of a single oldest child eliminates 2 6 6, leaving 3 3 8 as the only possible answer. Did you answer this riddle correctly?
YES NO
Porcupine Volleyball Riddle
Hint:
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