10 children lined up, even who was left, counted from the beginning again and again, and finally only Xiao Ming was left. Can you guess where Xiaoming ranks?

According to the meaning of the question, 10 children lined up, and even who was left, they counted over and over again, leaving Xiao Ming.

That means Xiao Ming has been in the queue in odd numbers.

Then Xiao Ming has been ranked first, and will be rearranged anyway.

Xiao Ming is the first, all singular, and finally Xiao Ming will be left.

So Xiaoming ranks 1.

Extended data:

This kind of problem belongs to the brain teaser problem in mathematics.

Brainstorming originated in ancient India. Brainstorming is a series of complete comic jokes published by the culture of the times on 1989 12.06, which changed from the comic question on the previous page to the unexpected answer after flipping through it.

At that time, there was a social craze in Taiwan Province Province, and all the streets and alleys were asking each other brain teasers, which evolved into a pattern of cold jokes and was later introduced to Chinese mainland.