Every time I take it, five red balls and three green balls are missing. Then for the remaining balls, the red ball is two less than the green ball.

Once again, five red balls and three green balls are missing. Then for the remaining balls, the red ball is four less than the green ball.

So a * * * is taken five times, so the remaining red balls are less than the green balls 10.

And because a * * * takes five red balls and it's all over, the number of red balls is 5*5=25.

There are 25 green balls.