Notes
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Seventeen clues is the minimum No sudoku with sixteen given digits has a unique solution. That was an open question for decades, and settling it took a year of computer time. Why tier lists start at S An A-to-F scale with an extra grade bolted on top, borrowed from Japanese arcade games. And why the good ones do not use drag and drop. Why your emoji is two characters long There are four ways to count the characters in a string, they disagree, and almost every text bug lives in the gap between them. Your photos know where you live Every phone photograph carries the coordinates it was taken at, to about a metre. Whether that travels with the file depends entirely on how you send it. Which tools belong on someone else’s page A tour of the families. Converters, money, the body, the workshop, chance, and the one kind that is better as a visit. One month after the 31st There is no 31 February, so a month has to land somewhere. Which somewhere is a rule, not a fact. Accuracy before speed: why raw WPM flatters you Ninety-two per cent accuracy at 60 raw is 55 net. The errors cost more than the speed earns. Why your PDF will not shrink A scanned contract halves. A forty-page report barely moves. The difference is what is inside the file, not how hard you compress it. Morse speed is measured with one word: PARIS PARIS is exactly 50 units of Morse. Divide by that and words per minute becomes milliseconds per dot. Halving a recipe that calls for three-quarters of a cup Three-eighths of a cup is six tablespoons. The awkward halves all have a clean answer in a smaller unit. What two more years on a car loan actually cost Stretching $28,000 from 60 months to 84 saves $131 a month and costs $2,558 in interest, and that is the smaller problem. American recipes in a European oven Every US baking temperature converts to an untidy Celsius figure, and then the fan takes another twenty degrees off.
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