Anonymous
Anonymous asked in Science & MathematicsMathematics · 6 months ago

The only prime factors of a number n are 2, 5, 7, and 17. Which of the following could NOT be a factor of n?

A)10

B)20

C)25

D)30

E)34

4 Answers

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  • 6 months ago
    Favourite answer

    10 = 2 x 5

    20 = 2² x 5

    25 = 5²

    30 = 2 x 3 x 5

    34 = 2 x 17

    n is not divisible by 30 as it would have to be divisible by 3 also.

    :)>  

  • 6 months ago

    You are not very bright, are you ?  Don't you have a calculator ?  Just TRY them, for god's sake.

    2 x 5 x 7 x 17 = 1190

    Now try dividing 1190 by each of the given numbers.  (Hint :  there are THREE answers.)

  • ?
    Lv 7
    6 months ago

     The only prime factors of a number n are 2, 5, 7, and 17. 

     Which of the following could NOT be a factor of n?

     Answer choice:

     D) 30

  • Anonymous
    6 months ago

    D because 3 would also be a prime factor

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