Novel Uses for Your Hands
Posted on January 31st, 2007 by Tim Almond
I like mnemonic and memory tricks. Such as Many Volcanoes Erupt Mouldy Jam, Smells Under Noses Pong as a way to remember the order of the planets.
There are two hand tricks. One I was reminded of earlier, and one I’ve just discovered. The first is the 9 times table trick. To calculate 9×3, drop your third finger. You have 2 fingers before and 7 fingers after, so that’s 27. This works for any finger, so if mental arithmetic isn’t your bag, then this helps.
The other trick is to do with days of the month. I’ve always had a problem with this. If you’ve had a problem remember which month has what, there’s an easy trick on the http://tipnut.com/monthly-knuckles/ page.
Yes, the knuckle method is classic but your 9 system is way cool.