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If x is an integer and y = 3x + 2, which of the following [#permalink]
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03 Mar 2014, 00:29
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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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03 Mar 2014, 00:30
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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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03 Mar 2014, 01:41
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Answer = C = 6 For any value of x as an integer, y = 3x+2 is not divisible by 6
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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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04 Mar 2014, 02:30
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I hope there must be a better way to solve this question But One method is :
Put different values of x : 0,1,2,3,4 .... so y = 2, 5, 8, 11, 14, 17, 20, 23, 26 ...
Now checking for answer choices : there is no multiple of 6 in the values of y
Hence Option C



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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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04 Apr 2017, 15:16
Bunuel wrote: If x is an integer and y = 3x + 2, which of the following CANNOT be a divisor of y?
(A) 4 (B) 5 (C) 6 (D) 7 (E) 8
We are given the following: y = 3x + 2 y  2 = 3x (y  2)/3 = x In order for y  2 to be divisible by 3, y must be 2 greater than a multiple of 3. Since y is 2 greater than a multiple of 3, y cannot actually be a multiple of 3. Thus, 6 CANNOT be a divisor of y. Answer: C
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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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26 Jul 2017, 04:47
I applied a plug in technique and POE. if x is 1; y is 5 (already present in options) so its a divisor of y if x is 2 ; y is 8; again a divisor of y (basis options) if x is 3; y is 11  drop if x is 4 ; y is 14 so 7 is a divisor if x is 5; y is 17 drop if x is 6; y is 20 so 4 and 5 are both divisors if x is 7; y is 23 if x is 8; y is 26
thus 6 is only non divisor.



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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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26 Jul 2017, 05:05
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Bunuel wrote: The Official Guide For GMAT® Quantitative Review, 2ND EditionIf x is an integer and y = 3x + 2, which of the following CANNOT be a divisor of y? (A) 4 (B) 5 (C) 6 (D) 7 (E) 8 Problem Solving Question: 125 Category: Arithmetic Properties of numbers Page: 78 Difficulty: 600 GMAT Club is introducing a new project: The Official Guide For GMAT® Quantitative Review, 2ND Edition  Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you! y = 3x+2 To solve it faster , lets start putting values in sequence x = 0, y = 2 x = 1, y = 5 x = 2 , y = 8 x = 3, y = 11 x = 4, y = 14 So, it is divisible by 4,5,7,8 . It is not divisible by 6. Answer C
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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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21 Aug 2017, 20:39
It took me a minute and 50 seconds to get this wrong, while Bunuel did it in about 10 seconds



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Re: If x is an integer and y = 3x + 2, which of the following [#permalink]
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22 Aug 2017, 02:16
pretty straight forward... for divisibility by 6 we need last digit to be 6... and when we see the cyclical nature of multiple of 3 we find no match which when added to 2 gives 6.....so answer is 6




Re: If x is an integer and y = 3x + 2, which of the following
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