There are two tour groups, group A is smaller than group B, and tickets are bought separately. The two groups paid for the tickets to 920 yuan. If you buy together, you only need 742 yuan.

Because 636 is not divisible by 8, it can be divisible by 6.

So 636 ÷ 6 = 106 people.

Team A has fewer people than team B..

So B has106 ÷ 2 = more than 53 people, and A has less than 53 people.

If 53 people buy tickets separately, the total ticket fee should be 848 yuan;

This doesn't fit the meaning of the question.

So there are less than 50 people in A.

A (920-106x8) ÷ (10-8) = 36 people.

B 106-36=70 people