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The average score of four people in a math exam is 8 1, and the scores of four people are different. The lowest score is 68, so what is the highest score?
8 1x4=324

Let the highest score be x, and when the scores of the other two people are (X- 1) and (X-2) respectively, x is the smallest.

68+X+(X- 1)+(X-2)=324

X=86.3, but x is an integer. When x takes 86, 86+85+84+68=323.

When x takes 87, 87+85+84+68=324, which is the same as.

So x is at least 87.

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