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Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
If 15 is a factor of 25N², which of the following must be a factor of
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03 Jun 2022, 09:50
03 Jun 2022, 09:50
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If 15 is a factor of 25N², which of the following must be a factor of N?
I. 3
II. 5
III. 75
(A) None
(B) I only
(C) II only
(D) I and II only
(E) I and III only
I. 3
II. 5
III. 75
(A) None
(B) I only
(C) II only
(D) I and II only
(E) I and III only
Re: If 15 is a factor of 25N², which of the following must be a factor of
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03 Jun 2022, 21:35
03 Jun 2022, 21:35
(E) I and III only
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: If 15 is a factor of 25N², which of the following must be a factor of
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05 Jun 2022, 07:00
05 Jun 2022, 07:00
1
GreenlightTestPrep wrote:
If 15 is a factor of 25N², which of the following must be a factor of N?
I. 3
II. 5
III. 75
(A) None
(B) I only
(C) II only
(D) I and II only
(E) I and III only
I. 3
II. 5
III. 75
(A) None
(B) I only
(C) II only
(D) I and II only
(E) I and III only
If 15 is a factor of 25N², then it could be the case that N = √3, because that would mean 25N² = 25(√3)² = 25(3) = 75, and 15 is a factor of 75.
If N = √3, then none of the possible values (3, 5 or 75) are factors of N
Answer: A
