About 20 years ago, people came out strongly against Common Core math, which focused on . . . um, well, students learning how to think rather than simply memorizing formulas.
These changes are confusing, especially if your math skills come from memorizing the times tables from those charts in the back of Pee-Chee folders.
New math, Common Core, traditional math: Which is best? I'm not sure, but one type of math is harder to understand than any of those.
Toilet paper math.
If you pay attention at the store, you recognize the problem. Look at the toilet paper section and your brain goes fuzzy.
Of course, there are simple packs of four, six or 12 rolls. But then the math comes in.
Some packages say, "18 rolls = 54 rolls," implying that each toilet paper roll is worth three regular rolls. OK, I get that.
But another says, "12 rolls = 42 rolls."
Another says, "18 rolls = 56 rolls."
Another says, "6 rolls = 15 rolls."
What the heck? I know enough about math to know that to solve for x in 6x = y, you divide y by 6 (I've already lost some of you. Hang in there!). If six rolls = 15 rolls, each roll must be worth 2.5 regular rolls. If 18 rolls = 56 rolls, each roll must be worth 3 regular rolls. If 12 rolls = 42 rolls, each roll must be worth . . . let me get my calculator out . . . 3.5 rolls.
(Side point: Suddenly, I'm wondering if "roll" is spelled correctly. It looks wrong. Should it be "role?" No. It's roll. Rollllll. Rooolllllll. Now I can't keep saying it in my brain. Roll.)
Back to the column: At first, I presumed it was simple. If a toilet paper company was advertising that 12 rolls = 24 regular rolls, it considers single-ply toilet paper a "regular roll" and is offering the two-ply variety. Other than the fact that no one buys single-ply toilet paper for their house (I believe it's only used in public restrooms), that made sense . . . until the math didn't work. If "12 rolls = 42 rolls," do they somehow have 3.5-ply toilet paper? What does a half-ply sheet look like? (For that matter, why is it "ply"? And is it really "ply?" Now I'm saying the word "ply" over and over in my brain.)
Perhaps it's not the number of plies, it's the number of sheets. Maybe a "12 rolls = 42 rolls" package of toilet paper has 3.5 times as many sheets. Probably not, because having three times as many sheets would make the roll much, much bigger (more math: the roll gets bigger with more sheets. And more sheets of more ply? And again, what is a ply?)
OK, I looked up ply and still don't really understand the specifics, but it appears that toilet paper only goes to three-ply. Of course, that's what they thought about razors before Gillette started adding more and more blades and now we have (I'm guessing) a shaving kit with 11 blades to make sure you get the smoothest shave possible.
So once you get past a multiplier of three (for instance, "12 rolls = 42 rolls"), it's more sheets, right?
But back to the ply question: Why haven't the big toilet paper manufacturers realized that the best way to add quality is to add a fourth or fifth ply? You could do a five-ply toilet paper with twice as many sheets and you'd be able to have a 12-roll package that is equal to . . . hold on, I'm calculating . . . OK, carry the two . . . 120 rolls! You might not need to get another package for months and months.
Of course, there comes a point where you add so many plies that it becomes a washcloth and you already have those and the thought is disgusting and never mind.
But how about that new math?
Reach Brad Stanhope at bradstanhope@outlook.com.