Logic puzzle #1! (Off-Topic)

by **Pineapples Studio** » Sun Oct 05, 2014 10:54 am

Bob and Rob are identical twins. They look alike in every measurable way, but Bob lies on Monday, Tuesday, and Wednesday, whereas Rob lies on Thursday, Friday, and Saturday. Both of them tell the truth on Sunday.

You come upon Bob and Rob one day and introduce yourself to them.

One twin (twin A) introduces himself as Rob and warns that he will lie tomorrow.

The other one (twin B) looks up in surprise and tells you that he is Rob. He also says that he lied yesterday and that he will also lie tomorrow.

Who is Bob, who is Rob, and what day of the week is it?

by **eknbb2** » Sun Oct 05, 2014 2:22 pm

evil-pineapples wrote:Bob and Rob are identical twins. They look alike in every measurable way, but Bob lies on Monday, Tuesday, and Wednesday, whereas Rob lies on Thursday, Friday, and Saturday. Both of them tell the truth on Sunday.

You come upon Bob and Rob one day and introduce yourself to them.

One twin (twin A) introduces himself as Rob and warns that he will lie tomorrow.

The other one (twin B) looks up in surprise and tells you that he is Rob. He also says that he lied yesterday and that he will also lie tomorrow.

Who is Bob, who is Rob, and what day of the week is it?

Twin A -> Rob, Wednesday.

by **Pineapples Studio** » Sun Oct 05, 2014 10:17 pm

Correct.

by **angelnomiluvr** » Mon Oct 06, 2014 1:38 am

eknbb2 wrote:
evil-pineapples wrote:Bob and Rob are identical twins. They look alike in every measurable way, but Bob lies on Monday, Tuesday, and Wednesday, whereas Rob lies on Thursday, Friday, and Saturday. Both of them tell the truth on Sunday.

You come upon Bob and Rob one day and introduce yourself to them.

One twin (twin A) introduces himself as Rob and warns that he will lie tomorrow.

The other one (twin B) looks up in surprise and tells you that he is Rob. He also says that he lied yesterday and that he will also lie tomorrow.

Who is Bob, who is Rob, and what day of the week is it?

Twin A -> Rob, Wednesday.

Please explain how you figured the right answer?

by **Pineapples Studio** » Mon Oct 06, 2014 1:57 am

Twin B is obviously lying, since neither person lies, tells the truth, and lies on three consecutive days.

Therefore, Twin A must be telling the truth, since both twins cannot lie on the same day.

Since it is not Sunday (since B is lying), it can only be Wednesday.

Twin A must be Rob, and twin B must be Bob.

by **angelnomiluvr** » Mon Oct 06, 2014 2:11 am

evil-pineapples wrote:Twin B is obviously lying, since neither person lies, tells the truth, and lies on three consecutive days.

Therefore, Twin A must be telling the truth, since both twins cannot lie on the same day.

Since it is not Sunday (since B is lying), it can only be Wednesday.

Twin A must be Rob, and twin B must be Bob.

Thank you. I did enjoy many of these types of puzzles, and figured out many, but maybe my brain was just too slow today

by **Pineapples Studio** » Mon Oct 06, 2014 2:15 am

They're not easy. I can post more in a few days if people are interested.

by **angelnomiluvr** » Mon Oct 06, 2014 2:57 am

evil-pineapples wrote:They're not easy. I can post more in a few days if people are interested.

I wouldn't mind them, it's a nice change from talking non-stop porn. And this is the general discussion forum

Logic puzzle #1! (Off-Topic)

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