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Math Help - Pretty questionable one.

  1. #1
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    Pretty questionable one.

    Hello, I seem not to know how to solve this:

    How many dictionaries are needed to be able to translate from one language to another spanish, latvian, russian, polish and german texts?

    I came up with this answer: 5*4*3*2/5 = 24.

    But the answer is said to be 30. What am I doing wrong? :\
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by Ellla View Post
    Hello, I seem not to know how to solve this:

    How many dictionaries are needed to be able to translate from one language to another spanish, latvian, russian, polish and german texts?

    I came up with this answer: 5*4*3*2/5 = 24.

    But the answer is said to be 30. What am I doing wrong? :\
    What translation cannot be achieved by the following list (assuming bi-directional dictionaries, or a list twice as long if they are only uni-directional, or a list of length 4 as the translation is allowed to use a chain of bi-directional dictionaries, or of length 5 for chains of uni-directional dictionaries):

    s<=>l
    s<=>r
    s<=>p
    s<=>g
    l<=>r
    l<=>p
    l<=>g
    r<=>p
    r<=>g
    p<=>g

    CB
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  3. #3
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    Thanks for the answer. So that means, 10 dictionares are needed?
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by Ellla View Post
    Thanks for the answer. So that means, 10 dictionares are needed?
    That is one answer. I would opt for four myself, but make your own choice. The question is ambiguous as stated and provided you justify your answer it should be OK.

    CB
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