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Allison's Birthday

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


Puzzle ID:#49084
Fun:*** (2.39)
Difficulty:** (1.68)
Submitted By:Gwendalla*us*




My dear friend Allison walked up to me and asked me what her birthday was.

"You forgot your own birthday?" I questioned her, with a puzzled look on my face.

"No," she said, "I mean I want you to remember it. You don't remember anything!"

"At least give me a hint," I pleaded.

Eventually she gave in. "First week of November."

Now, she and I are masters at logic. I myself knew it near instantly. Do you know what it is?


November 1, is her birthday. The only possible answer is 1. It is the only day guaranteed to be in the first week.

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Oct 15, 2011

She never said it was always in the first week of November. She could've been meaning it's in the first week of November of that year.
Oct 16, 2011

@GreenApple27 I agree, and I think this question needs further rephrasing.
Oct 16, 2011

Well, this teaser would be a trick question and would be impossible to figure out if she was saying just this year. Thus, one must use logic to conclude a true answer. The first of any month is ALWAYS in the first week. And Allison and the main character are both masters at logic, so the main character would deduce the answer, knowing that it would be impossible to know from that clue only to find the answer.
Oct 16, 2011

My apologies! I didn't realize there was an error in the hint. Let me edit it...

But how do I do that?
Nov 05, 2011

love it.
Nov 06, 2011

Much thanks!
Nov 09, 2011

good one!
Nov 11, 2011

Thank you!
Nov 19, 2011

Nice one
Nov 20, 2011

How do you edit a teaser?
Nov 20, 2011

How do you edit a teaser?
Feb 03, 2012

For some, the idiom "The first week in...." might mean Sunday thru Saturday, for others it might mean days 1-7. Since an error has been identified (and I am not sure if it has been corrected), then I will not belabor the issue...
Feb 24, 2012

Thank you, I will be sure to keep that in mind while writing my next teaser. I don't actually know how to edit teasers, so any help would be appreciated. Much Thanks!
Mar 28, 2012

enjoyed it.nice thinking
Aug 16, 2012

Got it almost right away. Easy but fun.
Nov 28, 2012

I agree that 'first week of November' implies November 1st-7th.

I used a different logic to come up with March 12th: 'week of November' implies week 11 of the year, i.e. days 71-77. The first of those is day 71, or March 12th (except in leap years...)

Incidentally, my wedding anniversary is November 1st, and I've always found, simply, "first of November" is sufficient to remember it.
Dec 06, 2012

Got it straight away... after reading it twice. Love the teaser though
Feb 26, 2013

Thanks! It does have errors, but I suppose practice will make perfect.

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