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math

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1)I AM greater than 15 and less than 40 if you double me I become a number that ends in 0 1/5 of me is equal to 5

2) if you multiply me by 2 ,I become a number greater than 20 and less than 40 if you multiply me by 6,I end in 8 if you multiply me by 4 I end in 2
Help me figure out who I am

  • math -

    1) 25
    1/5x = 5
    x = 5*5
    x = 25
    2)18
    It states that when it is multiplied by 2 it is between 20 and 40 so divide both 20 and 40 by 2 and that shows that your range of numbers is between 10 and 20.
    18*2 = 36 between 20 and 40
    18*6 = 108
    18 * 4 = 72

  • math -

    1)

    (1/5)x = 5
    x = ?

    2)
    From the first clue the number must be between 11 and 19
    Take it from there.

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