learn math well

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1 1 8 7

Judging from the unit result of this formula is 7, every number should be less than 7, otherwise "good" and "learning" are not less than 8, and there must be a number 8 and a number 9, so that the unit result of "good+learning" can be 7, which are discussed as follows.

(1) If "good" = 8 and "learning" = 9, we can know from the formula that "number" = 8, but "number+good" = 16 > 1 1, which is contradictory!

⑵ If "good" = 9 and "learning" = 8, we can know from the formula that "number" = 8, but "number+good" =17 >1,which is contradictory!

So both "good" and "learning" are less than 7, so starting from the tenth place, "number" should be less than 8.

According to the above analysis, "number" is less than 8, and "learning" and "good" are less than 7.

From the analysis, it can be seen that the percentile result is 1 1 or 10, which means that "number" and "good" should be the following combinations:

① Number = 7, goodness = 4, so we can know that Xue = 3 by one digit, but the number of Xue+Number = 10 in ten digits is not consistent with what is known!

② If number = 7 and goodness = 3, then "Xue" = 4 can be known by single digits, but the number of ten digits "Xue"+"Number" = 1 1 is not consistent with what is known!

③ Number = 6, goodness = 5, then we can know that "Xue" = 2 by one digit, and "Xue+Number" = 8 by ten digits, which is consistent with what is known!

④ Number = 6 and goodness = 4, then we can know that "Xue" = 3 from one digit, but "Xue"+"Number" = 9 from ten digits is contradictory to what is known!

⑤ Number = 5, good = 5, then "Xue" = 2 is known from one digit, but ten digits "Xue"+"Number" = 7 is contradictory to knowing!

⑥ Number = 5, goodness = 6, then we can know that "Xue" = 1 from one digit, but the number of "Xue"+"Number" = 6 in ten digits is inconsistent with what is known!

⑦ number = 4, goodness = 6, then "Xue" = 1 can be known from the single digit, but "Xue"+"number" = 5 of the ten digits is not consistent with what is known!

8 number = 4, good = 7, then everyone knows that this is impossible!

To sum up, this problem has only one result: number = 6, good = 5, and learning = 2.