Domino rules?

Question

What are the blank spaces on the domino like a 6/?

Is that like a wild that can be played anywhere? or do you have to play a blank against a blank?

Answer 1

I usually play where blanks are wild.

Answer 2

Blanks are zeroes. They can only be matched to other blanks

Answer 3

you have to play a blank against a blank.  It's not a wildcard, just a 0-value domino.  

good luck!