I apologize for the late post, I usually like to try to get these out in the morning...hence the name.

You have an object whose weight is an integer value somewhere between 1 and 100 and a balancing scale. What is the fewest number of weights you need to be guaranteed that you can correctly identify the weight of the object?

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edit: (extra spaces added so everyone that is trying to solve the brainteaser doesn't immediately see the answer)

Seven, if I understand the question correctly.

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Downeasta:

Seven, if I understand the question correctly.

Same

2^x = 100 --> x = 6.644 --> x = 7

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+1 each. more bananas for anyone that can explain the thought process better, or come up with a better solution??

Buddyfox, can you post like 5 times after the original post so upon opening the page everyone doesn't see the answer...

HFFBALLfan123:

Buddyfox, can you post like 5 times after the original post so upon opening the page everyone doesn't see the answer...

Good Idea, I will do this going forward.

Let x = 100

1. Choose 50
2. Choose 75
3. Choose 87
4. Choose 93
5. Choose 96
6. Choose 98
7. Choose 99

As you notice each time I keep halving the number.

Let x = 16.
1. Choose 50
2. Choose 25
3. Choose 13
4. Choose 19
5. Choose 17
6. Choose 15
7. Choose 16 for shits'n'gigs.

Robert Clayton Dean: What is happening?
Brill: I blew up the building.
Robert Clayton Dean: Why?
Brill: Because you made a phone call.

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