Brain Teasers
Birth Months
Four sisters, Sara, Ophelia, Nora, and Dawn, were each born in a different one of the months September, October, November, and December.
"This is terrible," said Ophelia one day. "None of us have an initial that matches the initial of her birth month."
"I don't mind at all," replied the girl who was born in September.
"That's easy for you to say," said Nora. "It would at least be cool if the initial of my birth month was a vowel, but no."
In which month was each girl born?
"This is terrible," said Ophelia one day. "None of us have an initial that matches the initial of her birth month."
"I don't mind at all," replied the girl who was born in September.
"That's easy for you to say," said Nora. "It would at least be cool if the initial of my birth month was a vowel, but no."
In which month was each girl born?
Answer
Sara was born in October, Ophelia was born in November, Nora was born in December, and Dawn was born in September.Nora's birth month obviously cannot be November. Since it doesn't start with a vowel, it cannot be October. Since she was talking to the girl who was born in September, it cannot be September. Therefore, it must be December.
The girl born in September obviously cannot be Sara. Since she was talking to both Ophelia and Nora, it cannot be either of them. Therefore, it must be Dawn.
This leaves the girls Sara and Ophelia and the months October and November. Ophelia cannot be born in October, so she must be born in November, and Sara was born in October.
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Comments
Wow, I have the honor of being the first commenter! I really like this type of logic puzzle. I figured it out fairly quickly, but I had a lot of fun doing so. Very cute teaser!
Fun and entertaining teaser; I got it fairly quickly. It is always more fun when you are able to figure it out.
A scip model that can be used for solve this can be found at
https://gist.github.com/
7cc60c1e343125d46282daf0c4a200d8
https://gist.github.com/
7cc60c1e343125d46282daf0c4a200d8
I enjoyed this riddle! It took me a minute to get it down, but hey - it was fun!
I don't understand the "obviously not Sara". Aside from Nora, how do we know who was in the room and who wasn't etc.
If any of you guys solved it, please explain. There is no hint that Sara was talking with Ophelia and Nora, It could've been Dawn. And why can't Nora's birth month be September? The rule was it cannot be vowel
From Ophelia's comment, Sara was not born in September, Ophelia not in October, Nora not in November, Dawn not in December.
The girl born in September replied to Ophelia, so Ophelia is not the girl born in September.
From Nora's comment, Nora was not born in October (which starts with a vowel). Since Nora replied to the girl born in September, Nora is not the girl born in September.
Nora now only has once choice, December.
With December taken, Ophelia only has one choice, November.
With November and December taken, Sara only has one choice, October.
This leaves Dawn and September.
The girl born in September replied to Ophelia, so Ophelia is not the girl born in September.
From Nora's comment, Nora was not born in October (which starts with a vowel). Since Nora replied to the girl born in September, Nora is not the girl born in September.
Nora now only has once choice, December.
With December taken, Ophelia only has one choice, November.
With November and December taken, Sara only has one choice, October.
This leaves Dawn and September.
I solved it this way:
The girl talking with Ophelia and Nora was born in September. It can't be Sara, so September is Dawn.
Nora isn't Sept or Nov, and October starts with an O so Nora is December.
Ophelia is then left with November and Sara is October.
The girl talking with Ophelia and Nora was born in September. It can't be Sara, so September is Dawn.
Nora isn't Sept or Nov, and October starts with an O so Nora is December.
Ophelia is then left with November and Sara is October.
that was easy i know it on my top of my head
I just wanted to use it for my friends!
lol idk
I don't mind at all, replied the girl who born on September.
Wow. Good question. I didn't think this is an information that lead to solving it. Very nuance.
Wow. Good question. I didn't think this is an information that lead to solving it. Very nuance.
My approach, the one born in September replied to Ophelia's comment. So Ophelia must be November or December.
Nora replied to the one born in September. And her's doesn't start with a vowel, so that excludes October. It obviously can't be November, so that leaves December.
Nora being December means Ophelia must be November given that it was previously determined she must be November or December.
The ones remaining are Sara and Dawn and the months remaining are September and October. Sara obviously can't be September, so that means she's October. That leaves Dawn being September.
Nora replied to the one born in September. And her's doesn't start with a vowel, so that excludes October. It obviously can't be November, so that leaves December.
Nora being December means Ophelia must be November given that it was previously determined she must be November or December.
The ones remaining are Sara and Dawn and the months remaining are September and October. Sara obviously can't be September, so that means she's October. That leaves Dawn being September.
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