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12-10-2004 04:50 AM  13 years agoPost 1
rchelipilot121

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A team of cryptologists is in the process of developing a four-digit code that can never be broken. They know that if the code begins with 0, 5, or 7, it can be cracked. What is the greatest number of four-digit codes the team can use that won't be broken?

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12-10-2004 05:02 AM  13 years agoPost 2
CK_

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Assuming the numbering system is decimal and not hex or octal then there are 10^4 or 10,000 total combinations. Subtract out 1,000 combinations each for 0, 5, and 7. That leaves 7,000 that can't be cacked.

EDIT: 53,247 in hex, 2,560 in oct

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12-10-2004 06:03 AM  13 years agoPost 3
Wa11banger

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Damn CK you hurt my head

Freakin brainiac

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

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12-10-2004 07:20 AM  13 years agoPost 4
CK_

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I hurt my head sometimes.

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12-10-2004 09:20 PM  13 years agoPost 5
rchelipilot121

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Boy it's a good thing you went back and put this in.....
EDIT: 53,247 in hex, 2,560 in oct
I was going to die laughing because you didn't have the answers in hex or oct....
Just kidding. Answer is exactly right, but you already knew that, didn't you?

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12-15-2004 04:32 AM  13 years agoPost 6
CK_

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That one was so easy I thought there was a catch or something.

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12-15-2004 02:06 PM  13 years agoPost 7
Vance

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York ,PA

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Hey CK_
Can you get my VCR to stop blinking 12:00 ???
Thanks
Vince D

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12-15-2004 07:32 PM  13 years agoPost 8
CK_

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Redondo Beach, CA

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Unplug it.

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12-15-2004 09:50 PM  13 years agoPost 9
rchelipilot121

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Unplug it.

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