Directions: Determine which number in the sequence below does not fit the pattern.

16, 56, 168, 420, 880, 1260, 1260

The correct answer is 880.

To determine which number does not fit the pattern, let us find the multiplier between consecutive terms in the sequence:

16, 56, 168, 420, 880, 1260, 1260

Let us calculate the multiplying factors step-by-step:

$16\times 3.5=56$

$56\times 3.0=168$

$168\times 2.5=420$

Notice that each multiplier decreases by 0.5 at each step (3.5, 3.0, 2.5, 2.0, 1.5, 1.0).

Following this rule, the next term should be calculated by multiplying 420 by 2.0:

$420\times 2.0=840$

However, the number provided in the sequence is 880 instead of 840.

We can check if replacing 880 with 840 satisfies the rest of the sequence:

$840\times 1.5=1260$

$1260\times 1.0=1260$

Since both subsequent terms match the sequence, 880 is indeed the wrong term that does not fit the pattern.