Brain Teasers
Vacation!
A vacationing family sitting around the campfire has the following conversation:
1. Father: What day is it? I am sure it isn't Tuesday, Wednesday or Thursday.
2. Mother: Well that's not very helpful dear. Besides yesterday was Friday.
3. Father: No, now that I think about it, yesterday wasn't Friday, tomorrow is Friday.
4. Jon: The day after tomorrow is Thursday.
5. Meg: You are nuts. Tomorrow is Thursday.
6. Mother: Actually, it's probably Thursday today.
7. Jon: All we know for sure is that it wasn't Sunday yesterday.
If only one statement above is true, what day of the week is it?
1. Father: What day is it? I am sure it isn't Tuesday, Wednesday or Thursday.
2. Mother: Well that's not very helpful dear. Besides yesterday was Friday.
3. Father: No, now that I think about it, yesterday wasn't Friday, tomorrow is Friday.
4. Jon: The day after tomorrow is Thursday.
5. Meg: You are nuts. Tomorrow is Thursday.
6. Mother: Actually, it's probably Thursday today.
7. Jon: All we know for sure is that it wasn't Sunday yesterday.
If only one statement above is true, what day of the week is it?
Answer
Number each person's statement and write down the list of days that it could be according to each statement.1. Monday, Friday, Saturday, Sunday
2. Saturday
3. Thursday
4. Tuesday
5. Wednesday
6. Thursday
7. Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
The only day mentioned one time is Monday. Therefore it must be Monday, otherwise one of the other statements would be true.
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Comments
WOO! I got it I'm a very lucky guesser
It's a bit easy but well done very interesteresting the way you used people instead of just numbering the staments like:
1.Yesterday wasn't friday
SO THANKS I RATE IT 9/10!
1.Yesterday wasn't friday
SO THANKS I RATE IT 9/10!
Fun teaser!
Nov 02, 2007
It was kind of Silly. But interesting nonetheless!
clever!
Great teaser!
fun teaser i actually got it right
I'd think that the inclusion of "probably" in statement 6 would make that statement useless, because if that is the true statement, it doesn't necessarily mean that it is Thursday, it just *probably* is. This doesn't affect the answer though, and it's a good teaser.
it was fun and i got it right
Nice one!
Very nice. I misread the last statement as saying it was Sunday for some reason, which screwed up my answer.
Whoops, I meant I read it as saying that it isn't Sunday TODAY.
Good teaser. I got it but had to work at it a while.
thanks!
thanks!
Ummm I have a problem with this...
1. it isn't Tuesday, Wednesday or Thursday. (meaning it could be Monday today)
7. it wasn't Sunday yesterday. (meaning it could be Monday today)
1. it isn't Tuesday, Wednesday or Thursday. (meaning it could be Monday today)
7. it wasn't Sunday yesterday. (meaning it could be Monday today)
It wasn't Sunday yesterday = it ISN'T Monday today
I agree with Jimbooth. Good teaser, especially for a Monday morning.
huh
And to think I did it the hard way!
Dec 31, 2007
If you run through the arguments Wednesday works aswell. Clue number 7 is true and all the others are false...
good one for hermione, but I'm Ron..
I kinda like this one. I just went on the idea of this: If (1) is true, that means (2) is false, not Saturday, (3) is false, not Thursday, (4) is false, not Tuesday, (5) is false, not Wednesday, (6) is false, not Thursday, (7) is false, not Sunday Tuesday Wednesday Thursday Friday Saturday. Which eliminates all except Monday.
Make another one, but with days of the month :-D
Make another one, but with days of the month :-D
I just looked at the last thing someone said and I am just like, Monday. I am so good. good teaser grilledcheese!
@runescaper:
If clue 7 is true, then clue 5 is false. If 5 is false, then tomorrow is not Thursday. If tomorrow is not Thursday, than today is not Wednesday.
If clue 7 is true, then clue 5 is false. If 5 is false, then tomorrow is not Thursday. If tomorrow is not Thursday, than today is not Wednesday.
I liked it, but... I think there's a loophole somewhere. I have to go through it again. I'm sorry to say that when i don't know exactly, but I have a feeling that there's a leak somewhere... I actually got Wednesday, like the person above said, so I'm wondering... anyway, I'm probably wrong, I know that, but I will check it out and if I'm right I'll post again, otherwise, I'm wrong. But either way, I still enjoyed it very much, and I hope you do some more similar ones. Really the best ones are the ones where you have to keep checking it because it's a REAL TEASER!
I may have lost it. But which sentence mentioned Monday at all.
It says Monday was only mentioned once??
Have I lost it? Don't get it at all!!
Sorry.
It says Monday was only mentioned once??
Have I lost it? Don't get it at all!!
Sorry.
Me again, which is the True
statement. I am lost on this one.
Have had lots of tea.
Happy New Year All!!!!
statement. I am lost on this one.
Have had lots of tea.
Happy New Year All!!!!
Rose again. Which is the only true statement?? Is it in the figuring
out part? I just don't get it.
Anyway, HAPPY NEW YEAR ALL !!!!
out part? I just don't get it.
Anyway, HAPPY NEW YEAR ALL !!!!
Sorry, the 2nd posting didn't show up right away. So thought it didn't take & wrote again. Did not mean
to post 3 times Now it is 4.
Sorry again
to post 3 times Now it is 4.
Sorry again
7. All I know for sure is it wasn't Sunday yesterday. Isn't that saying it can't be Monday? Confused.
Well you didn't get me that time. I read that sucker through three times. The only answer I came up with was Monday. Thanks for the teaser. Very fun.
Monday~
Monday~
Great teaser!
TAKE A CALENDAR!!!
TAKE A CALENDAR!!!
The only true statement:
I'm confuddled. Know how it feels, though! HAPPY NEW YEAR!!!
I'm confuddled. Know how it feels, though! HAPPY NEW YEAR!!!
Bit easy but fun. You only really need to look at No. 7 as this covers every day but monday.
SOMEBODY, Get those people a calendar!!!!
(Tricky comprehension problems are not my forte.)
(Tricky comprehension problems are not my forte.)
Sorry, couldn't get this one, didn't even try, not at my present stage of recovery (from last night's partying!). But still, very clever teaser, makes me wish I had waited till tomorrow to check my email!!!
i didnt get it either... did exactly what the answer said and labeled the possibilities... then read statement #7 and said well it cant be monday according to that statement... but it is monday... how???
What a vacationl. Any day is a good day but Monday so it had to be Monday. Great teaser there grilledcheese.
Fantastic teaser, even though I missed it
This teaser has a fallacy. Either clue 2 or 3 must be true, because they contradict each other if both are false. Read carefully! Clue 2 states yesterday WAS Friday (i.e. it is Thursday). Clue 3 states yesterday WASN'T Friday (i.e. it is NOT Thursday). It cannot be both Thursday and not Thursday (if both were false). However, having either clue 2 or 3 as true is contradicted by other statements being false. Clue 2 cannot be true because then clue 1 is also true (if it is Saturday, that is also not Tuesday, Wednesday, or Thursday). Clue 3 cannot be true because then clue 6 is also true (they both imply that it is Thursday). However, as another commentor stated, the word "probably" makes clue 6 useless because it cannot be true or false. If the phrase "yesterday wasn't Friday" is removed from clue 3, I would agree that the answer is Monday.
Fun but hard! Good job!
Nice one!
Fun! Took a bit of thinking but was a great teaser!
I had a sense that it was Monday due to its scarcity, but I couldn't really put my finger on the exact reasoning. I had to check out the explanation a couple of times before I could go 'yes, I see.' Phew!
Very nice
this was a good teaser but as some have pointed out, the wording is problematic in some places. The correct, "one true statement" is statement 1. However, the way the clues are written, statements 2 and 3 contradict each other so one must be true and one must be false. Unless you read it as saying, since the father comes directly after the mother, "you are wrong mother to say yesterday was friday (= yesterday wasn't friday) in fact, tomorrow is friday; so that the only statement he is asserting in clue three is there tomorrow is friday.
To have the father say "he is sure..." in clue one for it to be false means "he isn't sure" not that it is definitively not the case. Likewise, clue six, the falsification of "probably" is "probably not" not definitively not.
So, good teaser, it was creatively written but in the future use more precise language.
Best!
To have the father say "he is sure..." in clue one for it to be false means "he isn't sure" not that it is definitively not the case. Likewise, clue six, the falsification of "probably" is "probably not" not definitively not.
So, good teaser, it was creatively written but in the future use more precise language.
Best!
Jan 03, 2012
only one statement should be true.. but when the Father said that it wasn't Tue Wed, or Thurs. if that was true, then it should be Mon, Fri, Sat, or Sun. And the Mother's statement states that it was saturday that day. so both of their statements support each other... so both of them should be lies if there should only be one statement that is true.
Honestly, I found this pretty annoying because of the way its written. Statement 3 says: "No, now that I think about it, yesterday wasn't Friday, tomorrow is Friday." If 1 is true, then 3 is false.
Statement 3 countered is "Yesterday WAS Friday, tomorrow IS NOT Friday."- which would make it Saturday today, not Monday. Leading to an impossible event. When you say a statement is false, the WHOLE statement is false. I think this teaser needs to be rewritten. I appreciate the effort but to be honest, I don't like this one at all. Not because I didn't get it, but because I think it's wrongly worded.
Statement 3 countered is "Yesterday WAS Friday, tomorrow IS NOT Friday."- which would make it Saturday today, not Monday. Leading to an impossible event. When you say a statement is false, the WHOLE statement is false. I think this teaser needs to be rewritten. I appreciate the effort but to be honest, I don't like this one at all. Not because I didn't get it, but because I think it's wrongly worded.
Well, I finally got one of these. I don't usually try them, but am pleased that I did.
I enjoyed this one, but am not sure where all the confusion is coming from on this teaser. It is (to me anyway) quite straightforward and solvable. It is just not one that can be solved instantly. If you take the time to sit and work through each statement you can get it with relative ease.
I had absolutely no problems with this. There is nothing about statements 2 or 3 that prevents you from getting to the correct answer as they are both false about Monday, along with every other statement except 1; which, was what the question was asking for.
I usually love this type of puzzle, but today found it way too challenging. I'm going to read it again later when I've had my coffee. I ALWAYS love the comments and there are some good ones included here! Wishing everyone a very happy new year! Wishing you good health, love and happiness!!
Fun, easy and entertaining teaser. I got it fairly quickly.
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