Swinging At The Park Riddle
A man and his 6 year old daughter are swinging together at the park. Each is on a separate, identical swing. The man has three times the mass of the child.
Which swings faster? And more importantly, why?
Which swings faster? And more importantly, why?
Hint:
The speed at which a pendulum swings is called the period and given by the equation:
2 x pi x square root of (length of rope from fulcrum to Center of Mass divided by gravity)
Since gravity is constant, the only thing that effects the period is the length of rope. In the above scenario, you assume the man is taller then the child. Therefore his center of mass is higher. This makes the distance between the fulcrum to the center of mass shorter then for the child. The man swings faster. Did you answer this riddle correctly?
YES NO
2 x pi x square root of (length of rope from fulcrum to Center of Mass divided by gravity)
Since gravity is constant, the only thing that effects the period is the length of rope. In the above scenario, you assume the man is taller then the child. Therefore his center of mass is higher. This makes the distance between the fulcrum to the center of mass shorter then for the child. The man swings faster. Did you answer this riddle correctly?
YES NO
Half Magic Riddle
There was once a girl who was always jealous of her sister. One day a genie appeared and told her that he was "half magic" which meant that he could grant her wishes, but her sister would always get two times more than she did. She had three wishes. First, she wishes that she was the richest person in the world, but her sister soon became the richest because she got two times the money. Her second wish was that she was the most beautiful woman in the world, but her sister gets twice as much beauty.
What was her third wish?
What was her third wish?
Hint:
She asks the genie to grab a nearby stick and beat her half to death. Did you answer this riddle correctly?
YES NO
YES NO
I Join You In Battle Riddle
I join you in battle, fist clenched tight.
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.
What am I?
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.
What am I?
Hint:
Around You All The Time Riddle
Hint:
The More It Gets Wet Riddle
You use this every day
Many times I would bet
The more that you get dry
The more that it gets wet.
What is it?
Many times I would bet
The more that you get dry
The more that it gets wet.
What is it?
Hint:
Virgin Mary's Roommates Riddle
The Blessed Virgin Mary lived with at least eight other people at various times on earth.
How many of them can you name?
How many of them can you name?
Hint:
Marys housemates included her parents (traditionally, Joachim & Anne), Zachariah, Elizabeth, & John the Baptist, Joseph & Jesus, & the Beloved Disciple (traditionally, John the Apostle. See John 19:27.) Did you answer this riddle correctly?
YES NO
YES NO
The Four Digit Number Riddle
Can you find the four digit number in which the first digit is one fourth of the last digit, the second digit is 6 times the first digit, and the third digit is the second digit plus 3?
Hint:
The Clock Chime Riddle
Hint:
11 times. It chimes at zero and then once every second for 10 seconds. Did you answer this riddle correctly?
YES NO
YES NO
Frog In A Well Riddle
A frog fell into a well 12 feet deep. He could jump 3 feet, but every time he jumped 3 feet, he fell back 2 feet. How many times did he have to jump to get out of the well?
Hint:
The tenth jump took him out. (On the tenth jump he reached 13 feet and was out.) Did you answer this riddle correctly?
YES NO
YES NO
Blowing In The Trees Riddle
I can be very strong
But other times Im just a breeze
Although you cant see me
You can see me blow about trees
What am I?
But other times Im just a breeze
Although you cant see me
You can see me blow about trees
What am I?
Hint:
I Am Filled Up Riddle
I am filled up, however never go down. Spend a day with me and you won't frown. Sometimes I'm cold, other times I am not so bad. When you jump out of me, you won't be glad! what am I?
Hint:
50 Quarters Riddle
You have fifty quarters on the table in front of you. You are blindfolded and cannot discern whether a coin is heads up or tails up by feeling it. You are told that x coins are heads up, where 0 < x < 50. You are asked to separate the coins into two piles in such a way that the number of heads up coins in both piles is the same at the end. You may flip any coin over as many times as you want.
How can you do it?
How can you do it?
Hint:
Take x coins, flip all of them and put them in one pile. The rest of the coins form the second pile. Did you answer this riddle correctly?
YES NO
YES NO
The London New Year Riddle
In America the ball drops in Times Square to countdown to the New Year. In London how is the New Year rung in?
Hint:
Toss A Coin Riddle
If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?
Hint:
There is a 50/50 chance of each toss being either heads or tails. The previous toss does not impact the next toss. Did you answer this riddle correctly?
YES NO
YES NO
Fastest Horse Riddle
The London Racetrack needs to submit its 3 fastest horses to the Kentucky Derby out of 25 horses. However, all of their information was lost and they don't know any of the horse's times. Similarly, they all look identical so they can't remember who's fastest.
They can only race 5 horses at once, so what is the fewest number of races they can conduct to find the 3 fastest horses?
They can only race 5 horses at once, so what is the fewest number of races they can conduct to find the 3 fastest horses?
Hint:
First you divide the 25 horses into 5 groups of 5. You conduct the 5 races and take all of the fastest horses in those races and have a race with them, giving you the fastest horse. Then you take the remaining 24 horses (excluding the fastest) and remove the 4th and 5th horses in the first set of 5 races (since they definitely have 3 horses faster than them), leaving you with 14 horses. Next you can remove all of the horses that were beat in the preliminary race by the horses that got 4th and 5th in the championship race, leaving you with 8 horses. Finally, you can remove the horses that remain that lost to the 3rd place horse in the final race in the preliminary race and the horse that got 3rd in the preliminary to the horse that got 2nd in the championship race, leaving you with 5 horses.
You can then run a final race where the 1st and 2nd place horses are the 2nd and 3rd fastest. Then you know the 3 fastest horses. Did you answer this riddle correctly?
YES NO
You can then run a final race where the 1st and 2nd place horses are the 2nd and 3rd fastest. Then you know the 3 fastest horses. Did you answer this riddle correctly?
YES NO
Add Your Riddle Here
Have some tricky riddles of your own? Leave them below for our users to try and solve.