A super simple math problem. Challenge! See which one of you understands!

very simple

1+4=2+3=5

And 100 is a multiple of 5.

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When Xiao Hong types a certain number, Xiao Ming only needs to take the corresponding number in the group, such as 1 to 4 2 to 3, to ensure that the sum of the two people is 5 after one round.

5 10 15 20。 . . . . . Go on like this.

Xiaoming wants to make sure to win.

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