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Difficulty:
35%
(medium)
Question Stats:
72% (02:02) correct
28%
(02:08)
wrong
based on 292
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If x, y, and z are positive integers and \(2^x*3^y*7^z\) is divisible by 168 and 441. What is the least value of \(x*y*z\)?
A. 3
B. 4
C. 5
D. 6
E. 12
A. 3
B. 4
C. 5
D. 6
E. 12
22 Jun 2022, 16:24
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LCM is the least common multiple. If a number is divisible by two numbers is because he is divisible by the LCM of these two numbers. I found the LCM by factoring in prime numbers the two given numbers.
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