Therefore, the number of large classes is 6÷4=65438+ 0.5 times of the number of small classes, that is, the ratio of large and small classes is 3: 2.

Then everyone can get more points in small classes: 6× 1.5=9.

That is to say, it can only be divided into small categories: 6+9= 15.

Answer: Only small classes can be divided into 15.

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