The question is this:
If x and y are positive integers and 3x + 5 < x + 11, is x a prime number?
Forget about statements 1 and 2. You can simplfy the above to x < 3. Therefore, since x is a positive int, it can only be 1 or 2, which are both prime #'s right? Therefore without any statements, you know it is a prime # correct?
Manhatten DS problem
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no, he didn't.
3x + 5 < x + 11
subtract x and 5 from both sides => 2x < 6 => x < 3
by definition, 1 is not prime. So the object of the problem is to find if x = 1 or 2.
3x + 5 < x + 11
subtract x and 5 from both sides => 2x < 6 => x < 3
by definition, 1 is not prime. So the object of the problem is to find if x = 1 or 2.