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If x = a + 2 and b = x + 1, then which one of the following must be tr

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Math Expert
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If x = a + 2 and b = x + 1, then which one of the following must be tr  [#permalink]

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New post 07 Apr 2019, 21:11
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

92% (00:53) correct 8% (03:11) wrong based on 24 sessions

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Re: If x = a + 2 and b = x + 1, then which one of the following must be tr  [#permalink]

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New post 07 Apr 2019, 21:33
a= x-2
b=x+1

Since no constraint on the value of x picking test values (+ve, 0, -ve, fraction)

For +ve : x = 3 -> a = 1 & b =4 -> a<b
For 0 : a<b
For -ve : x = -5 -> a = (-7) & b = (-4) -> a<b
For fraction : x = 1/2 -> a = -1.5 & b = 3.5 -> a<b

IMO Answer: B
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Re: If x = a + 2 and b = x + 1, then which one of the following must be tr  [#permalink]

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New post 08 Apr 2019, 00:44
Bunuel wrote:
If x = a + 2 and b = x + 1, then which one of the following must be true?

(A) \(a > b\)

(B) \(a < b\)

(C) \(a = b\)

(D) \(a = b^2\)

(E) \(a = b^3\)


we can say
b=a+3
b-a=3
so B>A
IMO B
GMAT Club Bot
Re: If x = a + 2 and b = x + 1, then which one of the following must be tr   [#permalink] 08 Apr 2019, 00:44
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If x = a + 2 and b = x + 1, then which one of the following must be tr

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