alanforde800Maximus wrote:

A farmer constructs a fence along the northern edge of his property, using materials such

that he places a post every 7 meters. if he uses 100 posts, how many meters will the fence span?

a)686

b)693

c)700

d)707

e)770

Please assist with above problem.

I like the solutions above. I literally drew a picture.

For any specific range with "marked off" beginning and end values, there will always be one more tick than interval.

Wasn't sure I remembered that rule correctly, so I drew 10 posts, and wrote 7 in between:

|7|7|7|7|7|7|7|7|7|

Then I counted. 10 fence posts, but only

9 lengths of 7 in between. So 100 fence posts = 99 intervals of 7 meters.

99*7 = 693. Answer B

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