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Old 01-25-2006, 08:51 AM
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Works every time....but how???

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Old 01-25-2006, 10:11 AM
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Here's how it works:

Take the answer you typed in, add the digits, and round it up to the nearest multiple of 9. Your guess is the difference between the nearest multiple and the sum of the digits.

Eg: say I start with 6537. Jumble it to be 3765. The result is 2772 (i.e. 6537-3765 =2772). If you circle the last 2, then ur input is 277 (or 727, or 772).

Add 2,7,7 = 16. The closest multiple of 9 is 18. The difference between 16 and 18 is, drum-roll, 2.

You see why they don?t want u to cicrlce 0 now?
Old 01-25-2006, 11:56 AM
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Originally Posted by JStraw' post='229460' date='Jan 25 2006, 03:11 PM
Here's how it works:

Take the answer you typed in, add the digits, and round it up to the nearest multiple of 9. Your guess is the difference between the nearest multiple and the sum of the digits.

Eg: say I start with 6537. Jumble it to be 3765. The result is 2772 (i.e. 6537-3765 =2772). If you circle the last 2, then ur input is 277 (or 727, or 772).

Add 2,7,7 = 16. The closest multiple of 9 is 18. The difference between 16 and 18 is, drum-roll, 2.

You see why they don?t want u to cicrlce 0 now?
Tnx JStraw....took a few reads through, but I got it!
Old 01-25-2006, 04:17 PM
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Old 01-25-2006, 06:50 PM
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Old 01-25-2006, 08:34 PM
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JStraw - how long did it take ya to figure that out -- its genius...
Old 01-25-2006, 11:46 PM
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Old 01-26-2006, 07:11 AM
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Originally Posted by JStraw' post='229460' date='Jan 25 2006, 01:11 PM
Here's how it works:
I understand the "how" but not the "why." So, why do multiples of 9 work? Is it because by eliminating zero as a choice there are 9 digits left to use?
Old 01-26-2006, 08:17 AM
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That was pretty good. Great work Jstraw in figuring out how it works!!
Old 01-26-2006, 09:48 AM
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E60 forum has a bunch of genius we can ask for advice


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