A New Mnemonic with Several Innovative Features.

Easy to understand version of the mnemonic (explanation and map below) note that each line is constrained to contain exactly five syllables:






By ‘a math teacher’, I mean anyone teaching math, including a home schooler. I am not talking about a math teacher who is teaching computer science or some other subject. In computer science it often makes sense to pronounce binary numbers like telephone numbers; a mere series of numerals.


The mnemonic Roy G. Biv is the name of an imaginary person with the initials RGB, which recalls “red, green, blue” which are the names of the light primaries, also known as the primary colors, I noticed. This is in addition to its well-known function of recalling the classic seven colors of the rainbow “red, orange, yellow, green, blue, indigo, violet”.

I published the ideas of this article about two weeks ago but I can’t find my way back to that account, and so I am republishing it here.

That’s why I have a lot of sympathy for those who deny the fact.

It’s as if the creator of the universe, if there is one, wanted to humiliate the human race (and all life on earth, if it’s possible for it to be humiliated).

It’s awfully depressing and unpleasant…

You know the one.

Seven times nine? Seven less one is six, nine minus six is three, so sixty three. This well-known trick for calculating nine times any numeral sucks.

The problem is that you end up not knowing your nine times table properly. If you had memorized “seven times nine is sixty-three” you’d know it. But because you always used a trick to calculate it, you never learn it.

The best thing is to just learn it by rote.

If you must use a trick, here is a better one: “Seven times nine is seven times ten less seven, which is seventy less seven, which is sixty-three”. This is better because it is a real calculation that has meaning, and not a senseless mnemonic trick that happens to give you the right answer.

Photo by Manik Roy on Unsplash

They look precise, but aren’t.

The Wikipedia article called “Lead-crime hypothesis” is linked to below.

It contains this statement:

A 2011 study by the California State University found that “Ridding the world of leaded petrol, with the United Nations leading the effort in developing countries, has resulted in $2.4 trillion…

Matthew Christopher Bartsh

My favorite activity is learning new things.

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