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Riddles

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How can you throw a ball as hard as you can and have it come back to you, even if it doesn't bounce off anything? There is nothing attached to it, and no one else catches or throws it back to you.
 
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This logic puzzle was published in Martin Gardner's column in The Scientific American. You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?
 
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Try this. The Grand Master takes a set of 8 stamps, 4 red and 4 green, known to the logicians, and loosely affixes two to the forehead of each logician so that each logician can see all the other stamps except those 2 in the Grand Master's pocket and the two on her own forehead. He asks them in turn if they know the colors of their own stamps:
A: "No."
B: "No."
C: "No."
A: "No."
B: "Yes."
What color stamps does B have?
 
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64
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Try this. The Grand Master takes a set of 8 stamps, 4 red and 4 green, known to the logicians, and loosely affixes two to the forehead of each logician so that each logician can see all the other stamps except those 2 in the Grand Master's pocket and the two on her own forehead. He asks them in turn if they know the colors of their own stamps:
A: "No."
B: "No."
C: "No."
A: "No."
B: "Yes."
What color stamps does B have?
green
 
Messages
64
Reaction score
116
Points
43
This logic puzzle was published in Martin Gardner's column in The Scientific American. You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?
1st pick rod and try to pick it with one rod nad it does not take up other rod than try this with other one
that from which rod you were trying to pick other rod and try to pick up rod by another rod
 
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Pronounced as one letter, and written with three.
Two letters there are, and two only in me.
I'm black, blue, and gray.
I'm read from both ends, and the same either way.
What am I?
 
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883
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2,403
Points
253
My life can be measured in hours;
I serve by being devoured.
Thin, I am quick; fat, I am slow.
Wind is my foe.
What am I?
 
Messages
446
Reaction score
1,825
Points
153
Pronounced as one letter, and written with three.
Two letters there are, and two only in me.
I'm black, blue, and gray.
I'm read from both ends, and the same either way.
What am I?
Now is it 'eye'?
 
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