Input
Output

The number of brothers Anna has is twice the number of sisters Anna has.


The number of sisters Anna has is twice the number of brothers Anna has.


Does Anna have any siblings?


To solve the puzzle, let’s first define two variables:

Let ( b ) represent the number of brothers Anna has. Let ( s ) represent the number of sisters Anna has.

According to the problem:

  1. The number of brothers Anna has is twice the number of sisters she has: [ b = 2s ]
  2. The number of sisters Anna has is twice the number of brothers she has: [ s = 2b ]

We can use these equations to find a contradiction or a solution. Let’s substitute the first equation into the second:

Substitute ( b = 2s ) into ( s = 2b ): [ s = 2(2s) ] [ s = 4s ]

Subtract ( s ) from both sides: [ 0 = 3s ]

This implies that [ s = 0 ]

Given that ( s = 0 ) (Anna has no sisters), and since ( b = 2s ), it follows that [ b = 2 \times 0 = 0 ]

So ( b = 0 ) too (Anna has no brothers).

Thus, Anna does not have any siblings at all. Both original statements point to the fact that Anna has no siblings if the stated relations have to be maintained.


Evaluation

Evaluation ID
b3b1d482-6dae-45fb-8f7f-f1c3ad333ec6
Created
April 30, 2024

Evaluation Rating

Binary Pass/Fail
Fail
Factual Consistency
D: there is a disagreement between the submitted answer and the expert answer
Raw Output
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Raw Rating Output
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