The main thing to remember is that there are matches in the image that are only reflections and therefore should not count.
So, the correct answer is 8. Out of all the matches in the image, two are partially hidden behind the lighter (they just happen to match up perfectly with the reflections). And the other two are simply reflections of the matches in front of the shiny lighter. Here’s a picture of the solution.
Did you enjoy solving these fun math puzzles? Please be sure to pass them along to your family and friends to see how well they do.