Forty Five is the number on my house, and has two F’s for the A to Z Challenge! 45 belongs to the set of numbers that fascinated me when I was in elementary school. It’s a multiple of 9, 9×5, and its digits, 4+5, add up to 9, as do 18, 27, 36, 54, 63, 72, 81 and 90. I felt like I had discovered the secret of the universe when I learned this trick. On another math note, with more F’s, in 2011 I am 43, and my husband is 47, and we are both prime numbers at the same time, ie. a number that is only divisible by itself and the number 1.
Fun with Figures! At first, when I saw your link, I thought you were going to post on 45 records!
Linda Ann
Your house numbers look lovely and full of hospitality, but my head is kind of swirling with all that math though 🙂