T Adamietz wrote:
I think this is a poor-quality question and I don't agree with the explanation. My confusion in the answer comes from that "Z" can be 11 or 13 for both 1 & 2. One of the values is not canceled out by either of the solutions thus it is not sufficient. Why is C correct?
You should read the question carefully.
The question asks whether 143/z is an integer, not what is the value of z. For both value of z, 143/z IS an integer.
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