If $M=2007 \div 3, N=M \div 3$, and $X=M-N$, then the value of $X$ is
(A) 669
(B) 223
(C) 1338
(D) 892
(E) 446

Part B: Each correct answer is worth 6.
Since $M=2007 \div 3$, then $M=669$.

Since $N=M \div 3$, then $N=669 \div 3=223$.

Since $X=M-N$, then $X=669-223=446$.

ANSWER: (E)