GMAT Quantitative Reasoning Practice Test 4

Question : 27 of 100

Marks: +1, -0

X, Y

and

Z

are consecutive numbers

(X>Y>Z) . X+2 Y+3 Z=5 Y+4

What is

Z

Solution:

Use the answers to back solve.

X+2 Y+3 Z=5 Y+4 → X+3 Z=3 Y+4

Let's try the first answer:

Z=5

, so

Y=6

and

X=6

.
Let's check the equivalence:

7+15=22=18+4

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