Question

For every box of Oreo taken two replace it. If there was 48 boxes of Oreos taken how many Oreos are there now?

Answer 1

Do I just 48*2?

Answer 2

Insufficient information. We have 2 * 48 = 96 boxes added, but we do not know the number of boxes at the start.

If we start with just 1 box, we get:

1 - 1 + 2 = 2
2 - 1 + 2 = 3
etc.
47 - 1 + 2 = 48
48 - 1 + 2 = 49

We MUST know the start number.