squeak
This brings back memories from when I first solved this problem on my abacus… If you read post # 203 http://www.theyeshivaworld.com/coffeeroom/topic/the-riddle-thread/page/6#post-12885 in this thread you’ll understand how I remember the question.
Anyway- what’s “clam stuff”?
And by the way- I am not that old, I was born after the 50s.