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Taste examination questions: Reason of ⒌

From;  Author:Stand originally

Classmates queue up to go to see a movie, xiaoming is discharged in plus the 9th person, reciprocal the 10th person, how many fellow student does this team altogether have?


Solution: Xiaoming is discharged in plus the 9th person, the specification has 8 people before him, reciprocal the 10th person, the specification has 9 people at the back of him, plus Xiaoming, the number of this team is:


(9 - 1) + (10 - 1) + 1


8 + of = 9 + 1


= 18 (person)


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