Directions: Determine the number that should replace the question mark (?) in the following sequence.

327, 259, 199, 147, 103, 67, ?

The correct answer is 39.

To find the missing number in the given sequence, let us analyze the pattern by calculating the difference between consecutive terms:

$327-259=68$

$259-199=60$

$199-147=52$

$147-103=44$

$103-67=36$

Notice the sequence of differences obtained between consecutive terms:
68, 60, 52, 44, 36

Now, let us examine the pattern in these differences by calculating the change from one difference to the next:

$68-60=8$

$60-52=8$

$52-44=8$

$44-36=8$

The differences are consistently decreasing by 8 at each step. Therefore, the next difference to subtract from 67 is:

$36-8=28$

Subtracting 28 from the last term (67) gives the missing value:

$67-28=39$

Thus, the number that should replace the question mark (?) is 39.