this post was submitted on 12 Sep 2023
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Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?

The correct answer is 1 - slightly more compared to how many AIs got it right.

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[–] [email protected] 2 points 1 year ago* (last edited 1 year ago)

Same, using Chat GPT 4. It explained the steps without prompting, which is different from the single line answer shown in the post too. I got this…

Let's break this down step by step:

  1. Sally has 3 brothers.
  2. Each of those brothers has 2 sisters.

Sally is one of those sisters for each of her 3 brothers. Therefore, the second sister that each brother has would be the same other sister.

This means that Sally has only 1 other sister, making a total of 2 sisters in the family (including Sally herself).

So, Sally has 1 sister.