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Which of the following could be the difference between two positive in

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Math Expert
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Joined: 02 Sep 2009
Posts: 49271
Which of the following could be the difference between two positive in  [#permalink]

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New post 29 Jun 2018, 02:30
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

86% (00:32) correct 14% (00:30) wrong based on 36 sessions

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Re: Which of the following could be the difference between two positive in  [#permalink]

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New post 29 Jun 2018, 02:51
Bunuel wrote:
Which of the following could be the difference between two positive integers whose product is 28?

A. 1
B. 3
C. 4
D. 7
E. 14


We'll first factor 28 into its components.
This is a Precise approach.

28 = 7*4 = 7*2*2.
So, our two numbers can be (1,28), (2,14), (4,7).
Then the possible differences are 27, 12 or 3.

(B) is our answer.
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Re: Which of the following could be the difference between two positive in  [#permalink]

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New post 29 Jun 2018, 06:51
Bunuel wrote:
Which of the following could be the difference between two positive integers whose product is 28?

A. 1
B. 3
C. 4
D. 7
E. 14


We are asked to determine the difference between 2 positive integers whose product is 28.

Note: 2 integers whose product is 28*****

28*1 = 28
2*14 = 28
4*7 = 28

(7-4) = 3, which is option B.

B is the best answer.
Re: Which of the following could be the difference between two positive in &nbs [#permalink] 29 Jun 2018, 06:51
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