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When asked about her birthday, a young woman gives the following information: „The day after tomorrow, I turn 22, but I was still 19 on New Year's Day last year.“ When is her birthday?
The first thing you should do is determine what day this exchange is taking place. The woman says she's turning 22 in two days, so right now she must be 21. Hopefully these two points will give you something to go on.
The woman will turn 22 in two days, and her birthday, like all birthday, lasts but one day. She also mentions her age last year. A year, on the other hand, is a much larger period of time to deal with. In order for her statement to be true, her birthday needs to fall on a particular day. Think about how the above two fats help to narrow the possibilities.
This conversation took place at the very end of the year. if her birthday is in two days, it will have to be after New Year's Eve. That's right, it will be a new year by the day after tomorrow.
Her explanation might seem convoluted, but it's absolutely possible.
That's right! Her birthday is January 2nd, and your conversation with her must have taken place on december 31st. As you can see on the chart above, the woman was 19 on New Year's Day last year, and she turned 20 the next day. This year, she turned 21, and in two days, after the new year starts, she'll turn 22.
Die Lösung ist: 2. Januar.