The Traffic Light Riddle
There is a traffic light at the top of a hill. Cars can't see the light until they are 200 feet from the light.
The cycle of the traffic light is 30 seconds green, 5 seconds yellow and 20 seconds red.
A car is traveling 45 miles per hour up the hill.
What is the probability that the light will be yellow when the driver first crests the hill and that if the driver continues through the intersection at her present speed that she will run a red light?
The cycle of the traffic light is 30 seconds green, 5 seconds yellow and 20 seconds red.
A car is traveling 45 miles per hour up the hill.
What is the probability that the light will be yellow when the driver first crests the hill and that if the driver continues through the intersection at her present speed that she will run a red light?
Hint:
The probability of the driver encountering a yellow light and the light turning red before the car enters the intersection is about 5.5%.
At 45 mph the car is traveling at 66 feet/second and will take just over 3 seconds (3.03) to travel the 200 feet to the intersection. Any yellow light that is in the last 3.03 seconds of the light will cause the driver to run a red light.
The entire cycle of the light is 55 seconds. 3.03/55 = 5.5%. Did you answer this riddle correctly?
YES NO
At 45 mph the car is traveling at 66 feet/second and will take just over 3 seconds (3.03) to travel the 200 feet to the intersection. Any yellow light that is in the last 3.03 seconds of the light will cause the driver to run a red light.
The entire cycle of the light is 55 seconds. 3.03/55 = 5.5%. Did you answer this riddle correctly?
YES NO
Five Apples Riddle
There were five women sitting in a room. In the same room there was a basket with five apples in it. Each woman took an apple, but one apple still remained in the basket. How could this be?
Hint:
The fifth woman took the entire basket, with the apple still in it. Did you answer this riddle correctly?
YES NO
YES NO
Rivers With No Water Riddle
Hint: I represent an area of land or sea.
All Things Devours Riddle
This thing all things devours, birds, beasts, trees, flowers.
Gnaws iron, bites steel,
Grinds hard stone to meal.
Slays kings, ruins towns,
and beats high
Mountains Down
Gnaws iron, bites steel,
Grinds hard stone to meal.
Slays kings, ruins towns,
and beats high
Mountains Down
Hint: I'm free but also priceless.
Longest Human Nose Riddle
Hint:
Participating In A Race
Hint: It's not first place.
If you answer that you are first, then you are absolutely wrong! If you overtake the second person and you take his place, you are second! Did you answer this riddle correctly?
YES NO
YES NO
It Follows A River While Standing Still
Hint:
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
What Kind Of Room Has No Doors Or Windows Riddle
Hint:
The Turkey Crossing The Road
Hint:
Make It Rain
Hint:
A Base With No Room
What has a base but no room, a key but no lock, you can enter but you can't get into it? What is it?
Hint:
Running With No Legs?
Hint:
A Dark Room
Hint:
Cowboy Rides Into Town On Friday
Hint:
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