Is the number n an integer?
N - 7 is an integer
3 is an integer
Statement 1) N-7 is an integer. Since 7 is also an integer hence N must also be an integer. Sufficient
Statement 2) It can be written as 3N is an integer. N can be a a fraction such as 1/3, then also 3N will be an inetger or N can be an integer even then 3N will be an integer. Two cases, hence insufficient.
Prepositional Phrases Clarified|Elimination of BEING| Absolute Phrases Clarified
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