When I was learning multiplication, my father showed me the “rule of 9.” Multiply any number by 9, he said, and then add together the digits of the product, and you will... Read more »
Countless numbers come together to create the richness and depth of my life. Interestingly, as I age, the definition of “old” changes. 71: how many birthdays I have enjoyed; 40: how old... Read more »