If a positive integer n, divided by 5 has a remainder 2, which of the following must be true
I. n is odd
II. n+1 cannot be a prime number
III. (n+2) divided by 7 has remainder 2  Choose the correct choice from the following answers:
A) None
B) I only
C) I and II only
D) II and III only
E) I, II and III
n can be written as :   n = 5k+2. Thus, taking k=0, we have n=2.   I.n=2,even.False   II.2+1=3, is a prime. False.   III.n+2 = 4,4 divided by 7 leaves a remainder of 4. False.   NoneNSWER:None
<result>A</result>
If a positive integer n, divided by 5 has a remainder 2, which of the following must be true
I. n is odd
II. n+1 cannot be a prime number
III. (n+2) divided by 7 has remainder 2