Chrissy’s hand went up. “Mikey dearest, what the fuck is hexadecimal?”“I’m so glad you asked. It means base 16 or a counting system with 16 digits.” I added A to F after 9 on my whiteboard.“Now we need to talk about binary.”Beth spoke up, “I know that. Binary means 2. Right?”“Yes, that’s right.“Computers use binary bits. A bit can be thought of as a coin sitting on a table. It’s either heads or tails, or for computers, 1 or 0. It’s convenient to group 4 binary bits into 1 hexadecimal digit.” I wrote 0000 by zero all the way down to 1111 by F. Then pointing to ‘4 0100’, “This is not one hundred. And by the 8 this is not one thousand.”I wrote the numbers 8, 4, 2, and 1 over the binary numbers. “See how 1001 is 8+0+0+1 or 9. Notice the pattern of the binary digits from 0 to F. This will be on the quiz.”They looked shocked. Hiding my hex and binary numbers I wrote 1100. “Quickly now, what is this binary number in decimal?” I looked at my class and waited... Finally, Beth said, “12?”“Are. It was two o'clock when Dee left. The bar was quiet at that time, as it normally was at that time of the week. We weren't in a busy part of the city, and most of our customers were regular evening people. I closed up at three and decided I should do some cellar work. My mind wandered as I moved some barrels and cleaned the cellar floor. That could get messy if a beer keg blew out some juice. My mind began to think about Jo. I knew, well, was pretty sure she had a thing for me. And, if I wasn't with Dee, I would want to find out. Apart from a good sense of humour, she was pretty, and quite sexy. Shoulder length brown hair, petite figure, but not too sure how sexy as she usually wore comfy clothes to work.After working up a sweat in the cellar, I grabbed a sandwich and a cold bottle of beer and went upstairs to the flat above the bar, and bagan watching a bit of TV news. Suddenly I realised it was nearly re-opening time. I quickly grabbed the bar keys and went downstairs. As I entered.
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