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# If x and y are integers, is xy + 1 divisible by 3?

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Senior DS Moderator
Joined: 27 Oct 2017
Posts: 1118
Location: India
Concentration: International Business, General Management
GPA: 3.64
WE: Business Development (Energy and Utilities)
If x and y are integers, is xy + 1 divisible by 3?  [#permalink]

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24 Nov 2018, 09:46
00:00

Difficulty:

35% (medium)

Question Stats:

80% (01:17) correct 20% (02:15) wrong based on 30 sessions

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Project DS Butler: Day 19: Data Sufficiency (DS37)

If x and y are integers, is xy + 1 divisible by 3?

(1) When x is divided by 3, the remainder is 1.
(2) When y is divided by 9, the remainder is 8.

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Joined: 02 Sep 2009
Posts: 51121
Re: If x and y are integers, is xy + 1 divisible by 3?  [#permalink]

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24 Nov 2018, 10:05
gmatbusters wrote:

Project DS Butler: Day 19: Data Sufficiency (DS37)

If x and y are integers, is xy + 1 divisible by 3?

(1) When x is divided by 3, the remainder is 1.
(2) When y is divided by 9, the remainder is 8.

Discussed here: https://gmatclub.com/forum/if-x-and-y-a ... 89789.html
_________________
Re: If x and y are integers, is xy + 1 divisible by 3? &nbs [#permalink] 24 Nov 2018, 10:05
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# If x and y are integers, is xy + 1 divisible by 3?

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