3 Gallon Jug And 5 Gallon Jug
The problem is to fill one of the jugs with exactly 4 gallons of water. How do you do it?
You've got to defuse a bomb by placing exactly 4 gallons (15 L) of water on a sensor. The problem is, you only have a 5 gallon (18.9 L) jug and a 3 gallons (11 L) jug on hand! This classic riddle, made famous in Die Hard 3.
Hint:
Fill the 5-jug up completely. There will be, of course, 5 gallons in the 5-jug. You must fill all the gallons up to the top, otherwise you don't actually know how much you have.
Use the water from the 5-jug to fill up the 3-jug. You're left with 3 gallons in the 3-jug and 2 gallons in the 5-jug.
Pour out the 3-gallon jug. You're left with nothing in the 3-jug and 2 gallons in the 5-jug.
Transfer the water from the 5-jug to the three jug. You're left with 2 gallons in the 3-jug. And nothing in the 5-jug.
Fill up the 5-jug completely. You now have 2 gallons in the 3-jug and 5 in the 5-jug. This means that there is 1 gallon (3.8 L) of space left in the 3-jug.
Use the water from the 5-jug to fill up the 3-jug. Fill up the last gallon of space in the 3-jug with the water from the 5-jug. This leaves you with 3 gallons in the 3-jug, and 4 gallons in the 5-jug.
Fill the 3-jug completely with water. You now have 3 gallons (11.4 L) of water.
Transfer this water into the 5-jug. You now have nothing in the 3-jug, and 3 gallons (11.4 L) in the 5-jug.
Re-fill the 3-jug with water. You now have 3 gallons (11.4 L) in the 3-jug and 3 gallons in the 5-jug.
Fill the 5-jug with water from your 3-jug. You now have 1 gallon (3.8 L) in the 3-jug and 5 gallons (18.9 L) in the 5-jug. This is because, in the last step, you only had 2 gallons (7.6 L) of space left over, so you could only pour 2 gallons.
Pour out the 5-jug and refill it with your 1 gallon. You now have nothing in the 3-jug and 1 gallon in the 5-jug
Fill up the 3-jug. You now have 3 gallons (11.4 L) in the 3-jug and 1 in the 5-jug.
Transfer the 3 gallons (11.4 L) of water into the 5-jug to end up with 4 gallons (15.1 L). Simply pour over your three gallons into the 5-jug, which only had 1 gallon (3.8 L) in it previously. 1+3=4, and a successfully defused bomb. Did you answer this riddle correctly?
YES NO
Use the water from the 5-jug to fill up the 3-jug. You're left with 3 gallons in the 3-jug and 2 gallons in the 5-jug.
Pour out the 3-gallon jug. You're left with nothing in the 3-jug and 2 gallons in the 5-jug.
Transfer the water from the 5-jug to the three jug. You're left with 2 gallons in the 3-jug. And nothing in the 5-jug.
Fill up the 5-jug completely. You now have 2 gallons in the 3-jug and 5 in the 5-jug. This means that there is 1 gallon (3.8 L) of space left in the 3-jug.
Use the water from the 5-jug to fill up the 3-jug. Fill up the last gallon of space in the 3-jug with the water from the 5-jug. This leaves you with 3 gallons in the 3-jug, and 4 gallons in the 5-jug.
Fill the 3-jug completely with water. You now have 3 gallons (11.4 L) of water.
Transfer this water into the 5-jug. You now have nothing in the 3-jug, and 3 gallons (11.4 L) in the 5-jug.
Re-fill the 3-jug with water. You now have 3 gallons (11.4 L) in the 3-jug and 3 gallons in the 5-jug.
Fill the 5-jug with water from your 3-jug. You now have 1 gallon (3.8 L) in the 3-jug and 5 gallons (18.9 L) in the 5-jug. This is because, in the last step, you only had 2 gallons (7.6 L) of space left over, so you could only pour 2 gallons.
Pour out the 5-jug and refill it with your 1 gallon. You now have nothing in the 3-jug and 1 gallon in the 5-jug
Fill up the 3-jug. You now have 3 gallons (11.4 L) in the 3-jug and 1 in the 5-jug.
Transfer the 3 gallons (11.4 L) of water into the 5-jug to end up with 4 gallons (15.1 L). Simply pour over your three gallons into the 5-jug, which only had 1 gallon (3.8 L) in it previously. 1+3=4, and a successfully defused bomb. Did you answer this riddle correctly?
YES NO
Billy left for college in 2019.
Harry left in 2020.
Mark left in 2023.
Who left first?
Hint:
The mother. In order for Mark to be a single dad, the mother had to leave him and the kids first. Did you answer this riddle correctly?
YES NO
YES NO
Lighter Than Air Riddle
Hint:
You Are Sitting Inside A Plane Riddle
Where are you?
Hint:
Riddle Of The Two Barbers
After a moment of consideration, he decides to have his haircut done by the second barber.
Why?
Hint:
Both barbers must go to the other barber to get their haircuts. Since the first barber had a clean haircut, that means the second barber gives good haircuts and the first barber doesn't. Did you answer this riddle correctly?
YES NO
YES NO
There Are 5 Sisters In The Room Riddle
Ann is reading a book,
Margaret is cooking,
Kate is playing chess,
Marie is doing laundry.
What is the fifth sister doing?
Hint:
The 5th sister is playing chess with Katie as chess needs two players. Did you answer this riddle correctly?
YES NO
YES NO
We Turn It Off In The Morning Riddle
Hint:
Lambs Goats Turkeys Scottish Field Riddle
You're standing in a Scottish field with green as far as the eye can see and you're standing alone. You check left, you check right and there's nobody anywhere. Out of the horizon the farthest distance away, comes three lambs. They come up to you and say hello. The first one says "My names Marley!", the second one says "My names Barley!", and the third one says "My names Richard!"
You say hello to each and then they go "baaah" and go right back to where they came from. On your left you see three goats approach you from the horizon. "Hello! My names Billy!", My names Jilly!", "My names Willie!" You say hello to each and then they go "baaah" and go back to where they came. On your right you see three turkeys approach you from the horizon. "Hello! My names Veronica!", "My names Maisel!", "My names Brittney!"
You reply hello to each and then they go "baaah" and go back to where they came. All is silent and then you start thinking whos gonna come up behind me? So you turn around.
What three animals approach from behind you and what are their names?
You say hello to each and then they go "baaah" and go right back to where they came from. On your left you see three goats approach you from the horizon. "Hello! My names Billy!", My names Jilly!", "My names Willie!" You say hello to each and then they go "baaah" and go back to where they came. On your right you see three turkeys approach you from the horizon. "Hello! My names Veronica!", "My names Maisel!", "My names Brittney!"
You reply hello to each and then they go "baaah" and go back to where they came. All is silent and then you start thinking whos gonna come up behind me? So you turn around.
What three animals approach from behind you and what are their names?
Hint:
You Can Crack Me Riddle
Hint:
If A Door Number Fitter Riddle
Hint:
The answer is 20. Many people have been guessing anywhere from 9 to 19, but the correct answer is 20. Did you answer this riddle correctly?
YES NO
YES NO
The Person Who Built It Sold It Riddle
Hint:
Who Killed The Bride Riddle
Hint:
The 3 of them are suspects. A has a knife hidden in her bouquet, B has blood on her dress while C has her dress shredded. Did you answer this riddle correctly?
YES NO
YES NO
3 Men Enter A Room Riddle
Hint:
The third man is in a Wheel Chair. So he rolls out on Wheel Chair, instead of Walking out. Did you answer this riddle correctly?
YES NO
YES NO
Peanut Butter And Cereal Riddle
Hint:
Coronavirus Lunch Riddle
Hint:
Add Your Riddle Here
Have some tricky riddles of your own? Leave them below for our users to try and solve.