Find That Tennis Ball
You have 7 tennis balls that are all identical but one of them is slightly lighter than the others.
Using a balance scale and only two separate weightings, how can you find the light tennis ball?
Using a balance scale and only two separate weightings, how can you find the light tennis ball?
Hint:
Put three of the balls on each side. If they are even the ball that wasn't weighed is the light one. If they aren't even the side that is lighter has the light ball. Of these three balls, one should be put on each side. If the sides are even than the other ball is the light one. If they aren't even the one that is lighter is the ball you're looking for. Did you answer this riddle correctly?
YES NO
YES NO
How Many Batteries?
You have a flashlight that takes 2 working batteries. You have 8 batteries but only 4 of them work.
What is the fewest number of pairs you need to test to guarantee you can get the flashlight on?
What is the fewest number of pairs you need to test to guarantee you can get the flashlight on?
Hint:
7. If you break the batteries into 3 groups: Two groups of 3 and one group of 2. By doing this you guarantee that one of the groups has 2 working batteries. Both of the groups of 3 have 3 possible combinations of 2 batteries and the group of 2 only has 1 combination. So, 3 + 3 + 1 = 7 tries at most to find two working batteries. Did you answer this riddle correctly?
YES NO
YES NO
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:
12 Chocolate Bars
Hint:
5 because it says YOU take away 5 so YOU have 5 chocolate bars Did you answer this riddle correctly?
YES NO
YES NO
Forward And Backward
Hint:
The Barber Of Seville
The Barber of Seville shaves all men living in Seville.
No man living in Seville is allowed to shave himself.
The Barber of Seville lives in Seville.
Who shaves the Barber of Seville?
No man living in Seville is allowed to shave himself.
The Barber of Seville lives in Seville.
Who shaves the Barber of Seville?
Hint:
Eight Balls
There are eight balls, one of which is slightly heavier than the others. You have a two-armed scale, which you are allowed to use only twice. Find the ball thats heavier.
Hint:
Put three balls on each side of the scale. If the arms are equal, you know the heavy ball is one of the two remaining. If the arms are unequal, take the three balls on the heavier side, pick two and weigh them against each other. Did you answer this riddle correctly?
YES NO
YES NO
Robber Takes A Bath
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Star Wars Banquet Riddle
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Football Banking Riddle
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Bath Dog Riddle
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The Noisy Barking Dog
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Bad Cat Fact Riddle
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The Ball Of Yarn Riddle
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Backwards Cat Riddle
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