One of my students had a math assignment to complete. First it was a four fours puzzle -- which he was able to do and now the same idea with four eights. He has found all of the answers except how to make four 8s into 13. They are only allowed the "regular" functions, nothing advanced--sorry if that is ambiguous. Could someone please help? I am his English teacher and we really had a fun time with the problems in after school tutoring, but it bothers me that we could not answer one.
Thank you in advance.
8888 === 13 HOW??????