Consider the case where N is 6. N/2 is odd.
What about when N is 4. N/2 is even.
(1) is not sufficient.
You can use the same examples above to evaluate statement 2.
(2) is not sufficient.
Combining the information in both statements is also insufficient.
N could be 4 or 6 and result in N/2 being odd or even.
Is N/2 an odd integer?
(1) 2N is even.
(2) N is even.
Here the answer is E, but for me is D. here my explanation.
N/2= Odd ??
N= 2 x Odd= Even....so : N is Even ??
1) 2N= even Yes
2) N= Even
Or should I consider also the case where N/2 is even ??