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OpenStudy (anonymous):
All factors of 6 are factors of 42. Some factors of 42 are 7. Therefore, some factors of 6 are factors of 7. Is the argument valid or invalid?
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OpenStudy (anonymous):
Invalid. 7 is a prime number and not divisible by 2 or 3, the factors of 6.
OpenStudy (triciaal):
invalid; 7 is only one factor of 42 and as above 7 is a prime number.
OpenStudy (anonymous):
Ok thank you both.
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