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Math problems in sixth grade .....
Solution: 20 points for each person 10. If all shots are made, one person will get 200 points and the other two will get 208 points, so neither of them will make all shots.

Suppose B gets X, then A gets 9/ 17x. According to the meaning of the question:

X+9/ 17x=208

X= 136 (min)

So B got 136, and A got 72.

Suppose the armor has X rounds and (10-x) rounds miss the target.

20x- 12( 10-x)=72

X=6 (hair)

Suppose B hits X rounds, then (10-x) rounds miss the target.

20x- 12( 10-x)= 136

X=8 (hair)

A: A took six shots and B took eight.