My laptop number keys dont work

So a few questions:
Did you clean it with water first, and then it stopped working?
Did you spill anything on it?
Is it the Numberpad or standard numbers above they keyboard?
What model laptop is it?

If you spilled anything on the keyboard the keyboard may need to be replaced. If the laptop has been dropped or handled a lot the ribbon cable could be lose and just need to be reseated.