“妈妈,我们明天去上海,几点出发呀?”妈妈并没有回答我,只是递给我一张白纸,并且说:“有10个数字,它们每三个相邻数字之和都是15,现在只知道最后一位数是6,你知道这串数字的第一位数是什么吗?算一下吧,这样你就明白我们明天几点出发了。”我一听题,就被蒙住了,“这好像很难耶。”我自言自语道。于 “Mom, what time is it for us to go to Shanghai tomorrow?” “Mom did not answer me, just handed me a piece of white paper and said:” There are 10 numbers, and the sum of every three adjacent numbers Are 15, and now only know that the last digit is 6, do you know what the first digit of the series is? Calculate it, so you know when we start tomorrow. “” I am a question, It was blinded, “” It seems hard to tell. “” I said to myself. in