Arghh. I still can't figue out this math problem

TerranForces

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Sep 6, 2005
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A trivia question about math was posted on another forum and I just can't figure it out. I've been at it for days. I am sure one of you guys can get it. I'll send a couple gmail invites to whoever can figure it out. Its really bothering me. Anyway, here it is:

"# 9 - I hate math...so today's is worth 2 points

How many (more or fewer) possibilities does a typical mechanical lock have versus a combo lock? Closest noted estimation wins. Don't forget to show your work.

*Hint: typical mechnical locks - used on vaults, masterlocks.... combo lock - they're usually 6 digits ranging from 0 - 9 + the # key."

Most of the other questions get answered in a couple hours, but this one is approaching a week. My guess was 11^6 - 40x39x39 = ~1.7 million
It was wrong of course. The closest answer was 39,916,800 according to the OP.
 

Originally posted by: TerranForces
A trivia question about math was posted on another forum and I just can't figure it out. I've been at it for days. I am sure one of you guys can get it. I'll send a couple gmail invites to whoever can figure it out. Its really bothering me. Anyway, here it is:

"# 9 - I hate math...so today's is worth 2 points

How many (more or fewer) possibilities does a typical mechanical lock have versus a combo lock? Closest noted estimation wins. Don't forget to show your work.

*Hint: typical mechnical locks - used on vaults, masterlocks.... combo lock - they're usually 6 digits ranging from 0 - 9 + the # key."

Most of the other questions get answered in a couple hours, but this one is approaching a week. My guess was 11^6 - 40x39x39 = ~1.7 million
It was wrong of course. The closest answer was 39,916,800 according to the OP.
11! = 39,916,800

How the original poster could have deduced that answer? I have no idea. Maybe we need to know more, since the question is so vague. We are supposed to make assumptions about the number of keys on each lock.
 

TerranForces

Banned
Sep 6, 2005
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Well, we know the combo lock is 11x11x11x11x11x11. Now how many fewer does a typical mechanical lock have. We know it is closer to 39 million than 17 million. What is a typical mechanical lock?