Mathematics
A Well-Crafted Child’s Toy and Intriguing Object
Monday, February 18th, 2008I no longer recall how it came into my possession - very likely I bought it myself for one of my two children (Samuel who is now fast approaching 3 years and Caitlin who is around 7 months) - but I have a flexible baby toy that seems to be no longer available. It was […]
Mathematical trick #1: multiplying a pair of numbers in the 90s
Monday, January 7th, 2008
The performance
You ask for two random numbers in the nineties. (You needn’t let on in advance what you intend to do with the numbers). Perhaps, 93 and 98 are given. Almost immediately, you could write:
93 × 98 = 9114
You have no difficulty writing the answer from left-to-right rather than right-to-left. In other words, you are […]