When I taught in what you would call a grade school, 76 years ago, I used the last 5 mins of each class to play ``fizz-buzz'' :- one,two,three,four,fizz,six,buzz,eight,nine,fizz,eleven,twelve,thirteen, buzz,fizz,sixteen,buzzteen,eighteen,nineteen,fizz,buzz,twentytwo,... thirtyfive was fizzbuzz, etc. It had the advantage that it kept all the class thinking, as those who had dropped out were eager to catch mistakes by those still in ... R. On Thu, 21 May 2015, James Propp wrote:
My kids learned a variant of this, where you count round-robin but have to skip over all the numbers that contain a 5. "If you say the number five / you will be disqualified!"
Jim Propp
On Thu, May 21, 2015 at 1:35 PM, Mike Speciner <ms@alum.mit.edu> wrote:
Well, I remember my junior high French teacher having us count round-robin in French starting at one. The catch was that for every number that either had a seven in it, or was a multiple of seven, you were supposed to say "attention!" instead of the number. If you made a mistake, or took too long, you were eliminated, until one student was left. Keeping track of where you were when going through the seventies was particular hard.
On 21-May-15 12:56, Thane Plambeck wrote:
I'd like to know the origin of this commonly-deployed cognitive test.
It is a nice one I think—the first three stepping stones, 93, 86, and 79—have obscure factorizations, and it's only at 72 where I'm first able to be entirely confident that I haven't screwed it up, since 100-72 is "obviously" 28, which is 7*4. I'm weak at mental arithmetic generally speaking though.
Are there any other similarly-mathy tests like this that people use?
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