This puzzle is a cross number puzzle.
Now everyone had heard about Cross Word Puzzles. A Cross number puzzle is the same but you use numbers instead of letters. This one is fairly easy and anyone with a bit of Mathematical knowledge could do.
The aim of this puzzle is to solve the crossnumber and at the same time get the values of a b and c. If you are struggling then I will give you a little clue to start you off in the video.