GMAT Quantitative Reasoning Practice Test 4

Question : 44 of 100

Marks: +1, -0

a, b, c

and

d

are consecutive integers

(a< b< c< d)

.
What is the value of

(d+c)-(b+a)

Solution:

Plug in some numbers. Try

a=1, b=2, c=3

and

d=4

(d+c)-(b+a)=7-3=4

. It will work with any number since the difference between any two consecutive integers is always 1 .

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