if q= -7, then find the value of -q/3+q+1
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a digit that is the product of two other distinct digits.
q can be 6 (2*3) or 8 (2*4)
1 is insufficient
(2) q has only one odd factor.
This basically means that q is a power of 2 since all integers have at least one odd factor which is 1.
q can be 2, 4, 8, 16, etc
2 is insufficient
(1)+(2) q is a digit that is the product of two other distinct digits and q has only one odd factor
From the above cases, q must be 8
(1)+(2) is sufficient
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