Wednesday, 21 October 2015

Brain Teaser 2

Try giving an explanation too!

13 comments:

  1. If one servant is telling the truth, 3 servants would lie. Therefore 7×7=21, and take the different answers minus 21. The remaining nuber should be 6 or 8. 27-21=6, so the answer is green.

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    1. I also think the answer is green.


      Alicia

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  2. If one servant is telling the truth, 3 servants would lie. Therefore 7×7=21, and take the different answers minus 21. The remaining number should be 6 or 8. 27-21=6, so the answer is green.

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  3. This comment has been removed by the author.

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  4. I think anwser is also green color octopus.
    Russell

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  5. Replies
    1. Just take the three answers minus 21(at most) and that will give you 4,5,6 and 7
      Since he has no '4 and 5' servants, then it can only be 6 or 7. 7 always lies, so the answer is six which is the green servant

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  6. I don't understand... How do you get green? I still don't get it after reading Deanna's explanation...

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    1. Dear Tze Xin,
      Her explaination is only 1 servent will only tell the truth and the other 3 will tell lies. The text said that sevent which only have 7 legs will tell lie so find how many servent legs who lied (7x3=21). In the text it also said that servent who tell truth either have 6 or 8 legs.To find the truth servent you can either add 21 + 6 or 21 +8 but 21 +8 will give you 29 which is not in the "altogether we have __ legs" but 21+6 = 27 which is the green servent

      So the green servent is the answer!

      Desmond

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    2. Because there was 3 liars and all liars have 7 legs

      Desmond

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  7. But isn't there 1 green servant??
    Tze Xin

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