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Math Help - I need help!

  1. #1
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    I need help!

    Hello everyone!
    I have a tricky one. I can't find the answer. Do you have an answer for me?

    1. how can you obtain 10000 by adding/substracting/dividing/multiplying (whatever calcul) with only the number 9?

    thank you very much!
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by Mathildechina View Post
    Hello everyone!
    I have a tricky one. I can't find the answer. Do you have an answer for me?

    1. how can you obtain 10000 by adding/substracting/dividing/multiplying (whatever calcul) with only the number 9?

    thank you very much!
    (9+9/9) (9+9/9) (9+9/9) (9+9/9)

    or are brackets forbidden as well?

    RonL
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  3. #3
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    Unhappy Nines

    Thank you very much for your help, that's what i found too after a while.

    I have another tricky one which is bothering me a lot :
    Three guys are traveling in china and stop by a hotel. The hotel director announces the rooms' prices. A room for 3 is 30 RMB. They accept and each pays 10rmb. But the director suddenly realizes that he made a mistake. The room for 3 people was only 25rmb. Honest but not too much, he decides to give 1rmb back to each of the 3 guys and to keep the 2rmb resting for himself. So he gives back 3rmb et keeps 2. as a total the 3 guys will have paid only 9rmb each for the rent of the room.
    The tricky thing : 3x9=27rmb. and 25rmb+3rmb=28rmb
    where is the missing RMB?where did it disappeared?how is it possible

    If you have an answer, i ll be really grateful!
    thanks
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by Mathildechina View Post
    Thank you very much for your help, that's what i found too after a while.

    I have another tricky one which is bothering me a lot :
    Three guys are traveling in china and stop by a hotel. The hotel director announces the rooms' prices. A room for 3 is 30 RMB. They accept and each pays 10rmb. But the director suddenly realizes that he made a mistake. The room for 3 people was only 25rmb. Honest but not too much, he decides to give 1rmb back to each of the 3 guys and to keep the 2rmb resting for himself. So he gives back 3rmb et keeps 2. as a total the 3 guys will have paid only 9rmb each for the rent of the room.
    The tricky thing : 3x9=27rmb. and 25rmb+3rmb=28rmb
    where is the missing RMB?where did it disappeared?how is it possible

    If you have an answer, i ll be really grateful!
    thanks
    This is the missing dollar problem.

    RonL
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  5. #5
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    Quote Originally Posted by CaptainBlack View Post
    This is the missing dollar problem.

    RonL
    More appropraitely called, "how money is spend in USSR".
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  6. #6
    Grand Panjandrum
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    Quote Originally Posted by ThePerfectHacker View Post
    More appropraitely called, "how money is spend in USSR".
    "how money was spend in USSR"

    RonL
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