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Exam GMAT Test topic 1 question 344 discussion

Actual exam question from Test Prep's GMAT Test
Question #: 344
Topic #: 1
[All GMAT Test Questions]

If a, b, c and d are consecutive integers (a < b < c < d).
What is the value of (d + c) גˆ’ (b + a)?

  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 0
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Suggested Answer: E 🗳️
Plug in some numbers. Try a = 1, b = 2, c = 3 and d = 4.
(d + c) גˆ’ (b + a) = 7 גˆ’ 3 = 4. It will work with any number since the difference between any two consecutive integers is always 1.
by Mukite at April 17, 2022, 8:03 a.m.

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Mukite
6 months ago
let a =n, b = n+1, c= n+2 , d=n+3. (d+c)-(b+a) = (n+3+n+2) - (n+1+n) = (2n+5) - (2n+1) = 2n +5 - 2n -1 = 4 Correct answer is D (4)
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