Since my birth I have had a birthday cake with candles, one for each year of my

游客2023-10-14 53

问题 Since my birth I have had a birthday cake with candles, one for each year of my birthdays. To date, I have had 325 candles. How old am I?

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答案 25

解析假设当前年龄是n，则此时需要的蜡烛的总数为n(n+1)／2=325，可以解得n=25．

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