wu :: forums « wu :: forums - A Raise 3: Mission Impossible » Welcome, Guest. Please Login or Register. Jun 19th, 2019, 6:50pm RIDDLES SITE WRITE MATH! Home Help Search Members Login Register
 wu :: forums    riddles    what happened (Moderators: Grimbal, Eigenray, Icarus, william wu, towr, ThudnBlunder, SMQ)    A Raise 3: Mission Impossible « Previous topic | Next topic »
 Pages: 1 Reply Notify of replies Send Topic Print
 Author Topic: A Raise 3: Mission Impossible  (Read 72 times)
alien2
Uberpuzzler

Gender:
Posts: 6814
 A Raise 3: Mission Impossible   « on: Mar 12th, 2019, 7:06pm » Quote Modify

A turnkey has a riddle for his new young apprentice. In the store he places three different keys on the desk and asks him: “Which key out of the three opens the door to the store? You have the right to touch/use one of these keys only in order to try it out. If you answer correctly, the spare key is yours and also a raise. I’ll give you a bit of a hint too (or is it friendly banter?): By utilizing pure logic I am certain that you can arrive at the answer.”
 « Last Edit: Mar 12th, 2019, 7:09pm by alien2 » IP Logged

towr
wu::riddles Moderator
Uberpuzzler

Some people are average, some are just mean.

Gender:
Posts: 13683
 Re: A Raise 3: Mission Impossible   « Reply #1 on: Mar 12th, 2019, 11:27pm » Quote Modify

Maybe two of the keys have the same sort of cross-section? Which would mean either they both fit in the lock, but with only one allowing you to turn it, or the third key is the right one.
Or maybe the key that's not in the middle or on the left is the right one.
 IP Logged

Wikipedia, Google, Mathworld, Integer sequence DB
alien2
Uberpuzzler

Gender:
Posts: 6814
 Re: A Raise 3: Mission Impossible   « Reply #2 on: Mar 13th, 2019, 8:24am » Quote Modify

No. These are three "different" keys, any way you put it; though I respect thy erudition and imagination. Sounds like a dead-end, doesn't it? But perhaps, that was another clue . . .
 « Last Edit: Mar 13th, 2019, 8:48am by alien2 » IP Logged

towr
wu::riddles Moderator
Uberpuzzler

Some people are average, some are just mean.

Gender:
Posts: 13683
 Re: A Raise 3: Mission Impossible   « Reply #3 on: Mar 13th, 2019, 9:56am » Quote Modify

So they're different not just in the sense that they don't unlock the same lock?
Well, then just visual inspection of the locks and the key is sufficient. Given that one key will work, you don't even need to try one.
 IP Logged

Wikipedia, Google, Mathworld, Integer sequence DB
alien2
Uberpuzzler

Gender:
Posts: 6814
 Re: A Raise 3: Mission Impossible   « Reply #4 on: Mar 13th, 2019, 11:59am » Quote Modify

Apparently, I didn't provide all the relevant details. No, the keys are different, but you can't tell visually whether or not they fit the lock. They're "standard door keys", whatever that means, looking quite similar, though unlocking different doors.

Like I said, it looks like a dead-end. But, there is one valid solution, in my humble opinion.
 IP Logged

alien2
Uberpuzzler

Gender:
Posts: 6814
 Re: A Raise 3: Mission Impossible   « Reply #5 on: Mar 22nd, 2019, 4:47am » Quote Modify

Meh. There is a twist.
 IP Logged

 Pages: 1 Reply Notify of replies Send Topic Print

 Forum Jump: ----------------------------- riddles -----------------------------  - easy   - medium   - hard   - what am i => what happened   - microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »