GMAT Quantitative Reasoning Practice Test 6

Question : 4 of 100

Marks: +1, -0

x+ 1

a factor of 12 ?
(1)

x+1

is even.
(2)

x+1

is a factor of both 2 and 3 .

Statement (1), BY ITSELF, will suffice to solve the problem, but NOT statement (2) by itself.
Statement (2), BY ITSELF, will suffice to solve the problem, but NOT statement (1) by itself.
The problem can be solved using statement (1) and statement (2) TOGETHER, but not ONLY statement (1) or statement (2).
The problem can be solved using EITHER statement (1) only or statement (2) only.
The problem CANNOT be solved using statement (1) and statement (2) TOGETHER.

Solution:

Statement (1) could mean that

x + 1 = 8

, which is not a factor of 12. If

x + 1

is a factor of both 2 and 3, then

x = 0

and

x + 1 = 1

. One is a factor of every number. Statement (2) will suffice by itself.

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