I'm not sure what worksheet you are referring to, but chances are the capital Q looks like a 2 because it was written in cursive. The link below shows how each of the capital letters are formed and the Q definitely looks like a 2.
I've included a link to a video that demonstrates writing the letter Q in cursive. An uppercase Q does look like a 2, although, they teach this in school, I've never liked writing a cursive 2 like this and have always just made a prettier, normal Q. Hope this helps!
A cursive capital q should not look like a 2, I just ran into this today with my son. That is not how we learned to make one and I am wondering why in the world they would change it... I will be teaching him the old way as the new way doesn't even resemble a Q.. And there is no purpose in changing it..