Question

5. A group of friends are running a

relay race that covers 31 miles. If
each person runs+mile, how
many runners are there?

Answer 1

Answer: 8 runners

Explanation:

If you mean that " if each person runs one more mile than the previous runner" then:

First person = 1

Second person = 1+1

.....

(1)+(1+1)+(1+1+1)+(1+1+1+1)+(1+1+1+1+1)+(1+1+1+1+1+1)+(1+1+1+1+1+1+1)+(1+1+1)

1 + 2 + 3 + 4 + 5 + 6 + 7 + 3 =31

(the last runner runs less miles then needed)

8 runners