← | 032 - Broken Lance | 033 - Brothers 'n' Sisters | 034 - The Mysterious Memo | → |
Brothers 'n' Sisters is a puzzle in Professor Layton and the Unwound Future.
Puzzle
- US Version
Below are three siblings: A, B, and C.
A: "I have one older brother and three younger sisters."
B: "I have two older brothers and two younger sisters."
C: "I have three older brothers and one younger sister."
For all of their statements to be true, what's the smallest possible number of siblings there can be in the family?
- UK Version
There are three siblings: A, B and C.
A: "I have one older brother and three younger sisters."
B: "I have two older brothers and two younger sisters."
C: "I have three older brothers and one younger sister."
Given that all their statements are true, what is the lowest possible number of siblings in this family?
Hints
Solution
Incorrect
Too bad!
- US Version
It's not as simple as it might seem at first glance.
- UK Version
Remember that you want to find the minimum number of siblings.
Correct
- US Version
Right on!
The smallest possible number of siblings is six.
At first glance, it might seem like there are only five. But the fact that A says he has three younger sisters means there must be at least three female siblings. Likewise, the fact that C says she has three older brothers means there must be at least three male siblings. So five siblings isn't quite enough.
- UK Version
Bang on!
The lowest possible number of siblings is six.
At first glance, it might seem like there are only five. But the fact that A says he has three younger sisters means there must be at least three female siblings. Likewise, the fact that C says that she has three older brothers means there must also be at least three male siblings, so five siblings isn't quite enough.
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