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The Million Dollar Question

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Fun fact: It is by definition possible to do this in only twenty guesses if you do it this way:

 

You guess halfway. In this case, 500000. It's either correct, or 1-499999 or 500001-999999

 

Higher or lower. You guess halfway, that's either 750000 or 250000. Now, it's either 1-249999, 250001-499999, etc, or correct.

 

You continue doing this. Every time, you're splitting into twice as many possibilities. 2*2*2*...*2. Once you reach 20, you're at 1,048,576, so you're now splitting into less than one, so by definition you know the correct number.

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412973

Correct! You win ten points.

 

And no bonus points which means I've got another 10 points spare if you'd like me to think of another number?

 

412973

Correct! You win ten points.

 

And no bonus points which means I've got another 10 points spare if you'd like me to think of another number?

 

 

I just maxed out your credit card, glgl

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