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 Building a ruler (Posted on 2008-11-14)
I have an unmarked ruler (AD) of length 6cm. Making two marks in it, one (B) at 1cm from the left end and other (C) at 2cm from the right end, I´m able to measure any integer length from 1 to 6 cm:
```       +----+-------------+--------+
A    B             C        D```
AB = 1cm / CD = 2cm / BC = 3cm / AC = 4cm / BD = 5cm / AD = 6cm.

If I have an unmarked ruler of length 14cm, what is the minimum number of marks, and where do I have to make them, in order to be able to measure any integer length from 1 to 14cm?

 See The Solution Submitted by pcbouhid No Rating

 Subject Author Date re: 16 cm Charlie 2008-11-17 13:13:39 re: 16 cm --- thus... pcbouhid 2008-11-16 16:48:21 16 cm monica 2008-11-16 14:33:06 Golomb Rulers Brian Smith 2008-11-16 00:32:35 just 2 remarks Ady TZIDON 2008-11-15 11:11:26 re: Catch? Dej Mar 2008-11-14 23:48:22 Difficulty / Unique solutions ed bottemiller 2008-11-14 19:58:21 re: Catch? Gamer 2008-11-14 18:33:08 solution Charlie 2008-11-14 18:06:03 Catch? ed bottemiller 2008-11-14 17:35:35

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