We’re Not All Mathematicians
It is fun to play with riddles, especially when they are a stumper like this one. This person doubled down on their answer, and everyone just let them. We think that someone should have spoken up more emphatically to let them know this answer was not correct.
The answer is actually 67, and someone should have let the guy know that. Now he is going to go around telling this riddle until someone corrects him in person. That will hurt more than over the internet!