Come back a magician

Who’s planning back to school routines already?


OK, then just bookmark this for later.

There’s nothing quite so nice as to be astonishing in the classroom. Here’s a good one and you can finally put the smartphone to good use.

Tell your students to type a three digit number on their phone calculator. You are going to guess each and every one of their numbers.

Tell them to multiply that number by 9191.

They now tell you the last three digits of their calculator’s display.

You somehow, mysteriously, tell them the number they started with!

If you’d like Mathematics to come across as magic!

Details about how it’s done (and a chance to dig into the Mathematics) is located here on Quora. Just make sure that you present it with flourish.

Now, I know that Computer Science teachers are looking at this and saying “This is a wonderful exercise to program a solution for!”

Of course, this is also an opportunity to add flourish into the program too.

Don’t just stop with the top story … read on … there are some other great Mathematics examples to try.

OTR Links 12/23/2019

Posted from Diigo. The rest of my favorite links are here.