Re: brain teaser
Let’s name them. A1, A2, B1, B2, C1, and C2…1s are hubbies and 2s are wives.
A1 and A2 cross the river.
A1 stays on the other side and A2 takes the boat back
B1 and B2 cross the river
B1 stays on the other side and B2 takes the boat back
Now A2 and B2 stay on the other side and let C1 and C2 cross the river.
C2 comes back and takes A2 back.
Then B1 takes the boat back and brings his wife B2 back.
Did I get it? 