Physicists Sports Riddle
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Quantum Physicists Lovers Riddle
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Because when they find the position, they can't find the momentum, and when they have the momentum, they can't find the position. Did you answer this riddle correctly?
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Physicist Snacks Riddle
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Unhappy Physics Book Riddle
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Fighting Physicists Riddle
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21 Birthdays Riddle
Frederick died after a long and productive life of 87 years, but this epitaph was written on his headstone:
Frederick lived a good long life,
He loved his children and his wife,
He was honest, kind and deserved nothing but praise,
Even if he only had twenty-one birthdays.
How is this possible?
Frederick lived a good long life,
He loved his children and his wife,
He was honest, kind and deserved nothing but praise,
Even if he only had twenty-one birthdays.
How is this possible?
Hint:
He was born on February 29th in a leap year. Consequently, in his 87 years, he only witnessed twenty-one of his actual birthdays. The other years there was no February 29th. Did you answer this riddle correctly?
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Luke's Birthday Riddle
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Birthday Traditions Riddle
On Mark's 21st birthday he rented a boat and rowed out into the middle of a lake. It had been a tradition that when his dad, grandfather, and great grandfather turned 21, they would walk across the lake to a cabin. But when Mark got out of the boat, he almost drowned. When Mark asked his mom why this had happened, what did she say?
Hint:
Mark's mom said, "Your father, grandfather, and great grandfather were all born in January. You were born in July." Did you answer this riddle correctly?
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The Same Birthday Riddle
How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?
Hint:
Only twenty-three people need be in the room, a surprisingly small number. The probability that there will not be two matching birthdays is then, ignoring leap years, 365x364x363x...x343/365 over 23 which is approximately 0.493. this is less than half, and therefore the probability that a pair occurs is greater than 50-50. With as few as fourteen people in the room the chances are better than 50-50 that a pair will have birthdays on the same day or on consecutive days. Did you answer this riddle correctly?
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Billie's Birthday Riddle
Billie was born on December 28th, yet her birthday always falls in the summer. How is this possible?
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An Absentminded Philosopher Riddle
An absentminded philosopher forgot to wind up the only clock in his house. He had no radio, television, telephone, internet, or any other means of ascertaining the time. He therefore decided to travel by foot to his friend's house, a few miles down a straight desert road. He stayed there for the night and when he came back home the following morning, he was able to set his clock to the correct time. Assuming the philosopher always walks at the same speed, how did he know the exact time upon his return? Note: this is not a trick question. The Philosopher did not bring anything to his friend's house, nor did he bring anything back with him on his trip home.
Hint: We can assume that the journey to his friend's and back took exactly the same amount of time.
He Philosopher winds the grandfather clock to a random time right before leaving, 9:00 for example. Although this is not the right time, the clock can now be used to measure elapsed time. As soon as he arrives at his friend's house, the Philosopher looks at the time on his friend's clock. Let's say the time is 7:15. He stays overnight and then, before leaving in the morning, he looks at the clock one more time. Let's say the time is now 10:15 (15 hours later). When the Philosopher arrives home, he looks at his grandfather clock. Let's say his clock reads 12:40. By subtracting the time he set it to when he left (9:00) from the current time (12:40) he knows that he has been gone for 15 hours and 40 minutes. He knows that he spent 15 hours at his friends house, so that means he spent 40 minutes walking. Since he walked at the same speed both ways, it took him 20 minutes to walk from his friend's home back to his place. So the correct time to set the clock to in this example would therefore be 10:15 (the time he left his friend's house) + 20 minutes (the time it took him to walk home) = 10:35. Did you answer this riddle correctly?
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Thirteenth Birthday
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Dial 666
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An Elephants Communication
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You Play With Me At Night Riddle
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