OR 4 (IF THE HUNDREDTHS DIGIT WAS ROUNDED DOWN TO . THIS STATEMEN...

4) or 4 (if the hundredths digit was rounded down to 4). This

statement alone is NOT sufficient since it does not give us a

definitive value for a and tells us nothing about b.

(2) SUFFICIENT: This tells us that x rounded to the nearest

thousandth must be 1.436. This means, that a, the hundredths

digit, is equal to 3. As for b, the thousandths digit, we know that it

is followed by a 5 (the ten-thousandths digit); therefore, if x is

rounded to the nearest thousandth, b must rounded UP. Since b is

rounded UP to 6, then we know that b must be equal to 5.

Statement (2) alone is sufficient because it provides us with

definitive values for both a and b.

The correct answer is B.