What is the value of integer x?1) The lowest common multiple of x and ...
Ans.
(1) The lowest common multiple of x and 16 is 48 --> x can be 3, 6, 12, 24, or 48. Not sufficient.
(2) The greatest common factor of x and 16 is 4 --> x can take more than one value, for example, 4, 12, 20, .. (basically any number of the form 4*odd). Not sufficient.
(1)+(2) The most important property of LCM and GCD is: for any positive integers x and y,
x∗y=GCD(x,y)∗LCM(x,y). According to this 16x=48*4 --> x=12. Sufficient.
Answer: C.
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What is the value of integer x?1) The lowest common multiple of x and ...
Statement 1: The lowest common multiple of x and 16 is 48.
To find the value of x, we need to determine the factors of 16 and see which one is also a factor of 48.
Factors of 16: 1, 2, 4, 8, 16
Factors of 48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
From the factors above, we can see that the only factor common to both 16 and 48 is 16. Therefore, x must be a multiple of 16.
Statement 2: The greatest common factor of x and 16 is 4.
To find the value of x, we need to determine the factors of 4 and see which one is also a factor of 16.
Factors of 16: 1, 2, 4, 8, 16
Factors of 4: 1, 2, 4
Again, the only factor common to both 16 and 4 is 4. Therefore, x must be a multiple of 4.
Combining both statements:
Since both statements tell us that x must be a multiple of both 4 and 16, we can conclude that x must be a multiple of the least common multiple of 4 and 16, which is 16.
Therefore, the value of x is 16.
Conclusion:
Both statements together are required to answer the question as individually they do not provide enough information. However, when combined, we can determine that the value of x is 16. Therefore, the correct answer is option B.
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