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More ways to get Braingle...

Guess My House

Logic puzzles require you to think. You will have to be logical in your reasoning.

 

Puzzle ID:#49582
Fun:*** (2.92)
Difficulty:** (1.35)
Category:Logic
Submitted By:dalfamnestAnz*******

 

 

 



Mac's new house number has three digits. When she challenged her friends to guess it, they tried: 135, 780, 785, and 732.

"That's amazing," Mac said. "You've each guessed exactly one digit correctly and in its right place!"

What is Mac's house number?


Hint

The fact that three guesses began with a 7 will give you a good start.
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Comments

Marpleen*
Sep 03, 2012

Excellent! It made me think very hard!
kidkilowatt
Sep 05, 2012

Not extraordinarily difficult, but very engaging due to the casual, fun narrative!
BeanSCus*
Sep 07, 2012

Very well done, creative!
dalfamnestAnz*
Sep 07, 2012

Thanks. It's based on the old "Mastermind" logic game - which I stopped playing in early married life when my wife always beat me! It's fun to write a little storyline to go with the logic.
ImConfused
Sep 14, 2012

As my name goes, I'm quite confused. Do the second and third guess share the second digit? or else, what prevents the last digit from being from the 2nd guess instead of the last?
dalfamnestAnz*
Sep 15, 2012

Hi ImConfused! Yes, the second and third guesses both had the same digit correct. That would have to be the case, as there are only three digits and four people guessing! Hope you enjoyed it, though!
PYTHON**
Oct 03, 2012

Cool, I liked it!
Jeppydog*
Nov 03, 2012

GREAT PUZZLE! Elegant! And a lot of fun.
Thanks!
HABS2933Aca*
Nov 03, 2012

Though easy, very enjoyable.
Jekyll
Nov 03, 2012

How can four people each get only one digit right of a three-digit number?
cutebugAus*
Nov 03, 2012

I thought it was enjoyable, although very easy.
dalfamnestAnz*
Nov 03, 2012

At least two of them must have guessed the same digit correctly ... which is part of the logic required to solve it!
corcon*us*
Nov 03, 2012

Mind...exploding...
FatHeadAus*
Nov 03, 2012

Not bad, but a little too easy. I just took a random guess based on the clues, with the first possibility for the hundreds, the next possibility for the tens, and the only remaining possibility for the ones. And it checked!
thecatladycac**
Nov 03, 2012

Fairly easy - but it is nice having a little brain stimulation, but also having the satisfaction of solving fairly quickly! I enjoyed your teaser!
iggy39Aus**
Nov 03, 2012

never was any good at this kind of teaser.
auntiesisAus*
Nov 04, 2012

Great teaser even though it was a little on the easy side. The 3 sevens made it easy to get the first number. After that it was a piece of cake.
trewqus*
Feb 21, 2013

great job! at first, it seemed impossible, but after reading it a couple times I got it! (I did write it down though )
DarthXenontus
Feb 26, 2013

Here's how I found out (and it probably should be the explanation in the answer, as it may be unclear):
There are four guesses, which means that one of the digits was repeated twice.
The first digit is 1 since 7 was repeated three times, eliminating the first guess.
The second digit is 8 since it was repeated twice in the second and third guesses.
By process of elimination, 2 is the third digit, which is in the fourth guess.
Tpopfunstar
Jul 01, 2013

I got it right! It wasn't very difficult, but still fun
Zykezexus*
Jan 05, 2014

Great one!



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