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12 Sep 2025, 10:13
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
84% (01:09) correct
15% (02:15) wrong based on 13 sessions
History
Date
Time
Result
Not Attempted Yet
If \(5b = 6c = 7d = 120,\) then what is the value of \(\frac{7bd}{c}\)?
A. 100
B. 120
C. 144
D. 148
E. 196
A. 100
B. 120
C. 144
D. 148
E. 196
27 Sep 2025, 12:17
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Official Explanation
If the four parts of the equation 5b = 6c = 7d = 120 are all equal, then any two parts are equal, so 5b = 120 and 6c = 120. Then division shows that b = 24 and c = 20. We are asked for
which equals
by substitution. Finally, substitute 120 for the entire 7 d, and the last expression becomes
Answer: C
GMAT-Club-Forum-uyoml7zz.png [ 4.41 KiB | Viewed 134 times ]
GMAT-Club-Forum-qmlga52l.png [ 11.69 KiB | Viewed 134 times ]
GMAT-Club-Forum-da7niga0.png [ 20.21 KiB | Viewed 135 times ]
If the four parts of the equation 5b = 6c = 7d = 120 are all equal, then any two parts are equal, so 5b = 120 and 6c = 120. Then division shows that b = 24 and c = 20. We are asked for
which equals
by substitution. Finally, substitute 120 for the entire 7 d, and the last expression becomes
Answer: C
Attachment:
GMAT-Club-Forum-uyoml7zz.png [ 4.41 KiB | Viewed 134 times ]
Attachment:
GMAT-Club-Forum-qmlga52l.png [ 11.69 KiB | Viewed 134 times ]
Attachment:
GMAT-Club-Forum-da7niga0.png [ 20.21 KiB | Viewed 135 times ]
