Dr. Pepper-
I’m happy to see your methodology is close to mine (I think), although yours is much more concise.
I appreciate your taking the time to explain it so clearly.
I never had a teacher named “Pepper”, nor did I realize you have a PhD.
I did not know you were a teacher – it was a guess.
Your English usage is very precise, hence your earlier statement “Here’s one from the textbook I used for calculus” clued me in that you might be a teacher.
A student would more likely say “Here’s one from the textbook I HAD for calculus” or “Here’s one from the textbook WE used for calculus”.
I like “playing detective” – sometimes I’m right and sometimes I’m wrong. I don’t feel too bad when I’m wrong – even Sherlock Holmes had his “The Yellow Face” misadventure.
I do enjoy math and other puzzles, but it’s quite likely any advanced ones will be over my head – my education didn’t include college.
(It goes without saying – please provide some anyway).
oomis1105-
Thank you for your kind words, but don’t give me too much credit – that was my seventh guess.
squeak-
“(2 * 40 * 30) / (40 + 30)”
For someone who dislikes math, that’s an awfully elegant solution.
Re: Change is good!- nice try, but I half to remind you that you may half forgotten something 😉