Some people stand in the queue, 1, 2 count, the first round, report 1 out, the rest continue to report, report 1 out, the rest have been pressing report 2 out, until the last person left, what position was he in the first team? Just now my younger brother did the original problem. He had been in primary school for two years. I calculated that he should use the existing conditions to challenge his IQ

Some people stand in the queue, 1, 2 count, the first round, report 1 out, the rest continue to report, report 1 out, the rest have been pressing report 2 out, until the last person left, what position was he in the first team? Just now my younger brother did the original problem. He had been in primary school for two years. I calculated that he should use the existing conditions to challenge his IQ

Top 4
Number: 1,2,3,4,5. N
The number left after the first count: 2,4,6,8,10,12. N
After the second count, the remaining numbers are: 4, 8, 12, 16. N
No matter how to report 2, number 4 is reported as 1, so he is left in the end

AB + B = 82, Ba + B = 73, a =?, B =?. the answer is 7 and 6, please guide!

Let AB + B = 82 be Formula 1, Ba + B = 73 be formula 2, and so on
Ab-ba = 9 can be obtained by subtracting formula 2 from Formula 1. Thus, a and B must be two adjacent natural numbers greater than 0 and less than 10,
Because B is less than 10, from Ba + B = 73, B can only be equal to 6 or 7
Similarly, a can only be equal to 7 or 8
Because a is equal to 7 or 8, Ba must be less than 70, so B can only be 6, so a can only be 7

At the end of 1999, 13 survey organizations conducted a survey of 2440 urban residents in 14 cities including Beijing, Dalian and Changchun. The survey shows that the average monthly income of families in these 14 cities is 821 yuan. What is the average annual income of families in these 14 cities in 1999?

9852