Using the first two houses as an example,can you work out which n_英语解答

Using the first two houses as an example,can you work out which number is missing from the third
house?
3 9 6
4 7 8 2 3 4
2 4 4 3 6 8 7 5

人气：140 ℃　时间：2020-04-14 13:45:46

解答

9
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