Gratitude: Day 10

Need to multiply your 9s? Hold all your fingers up in a line. In the case of 9 x 3, fold down the third finger from the left. The fingers remaining show the answer. In my example, I have 2 fingers, a space, then 7 fingers. So, the answer is 27! Works for the entire set of 9s. Brilliant!

I am so, so grateful to The Mighty Quinn for showing me this trick.