Question

A company puts up a billboard every 4 miles along 432 miles of highway. How many billboards does the company put up?

Answer 1

108

Explanation:

We know that the company puts up a billboard every 4 miles, so it would put up 2 every 8 miles, 3 every 12 mile, etc.

So, to compute how many billboards along 432 miles, we divide:

`432/4=108`

Thus, the company puts up 108 billboards

Answer 2

`109` if there is one at the start of the highway as well.

Explanation:

Be careful with questions like this ... it is easy to forget about the first one.

Consider putting up a fence of 8 metres with the poles `1m` apart.

You will need `9` poles, not `8`

The first pole can be thought of as being at the beginning, like `0`
The second pole will be `1m` away
The third pole will be `2m` away .. etc
The ninth pole will be `8m` away.

The first billboard will be put up at the start of the highway.
The second will be `4` miles away
The third will be `8`miles away.

There will always be one more than what it appears to be.

`1" "larr` this is the one at the beginning.
`432 div 4 = 108" "larr` these are the ones along the highway,

There will be `109` billboards