Finnding greates common denoinator

[Physics_MHS]

Homework Statement

Find GCD of the following #S
2.3, 1.8, 3, 2.5, 1.7, 2.3, 3.4,
2.6, 3.1, 3, 2.5, 1.7, 2.3, 3.9,
3.1, 3.2, 3, 2.6, 1.8, 2.4, 4,
3.9, 3.6, 3.3, 3.5, 2.3, 2.6, 4.5,
4.3, 3.8, 3.3, 3.6, 3.5, 3.3, 4.7,
4.4, 4.5, 3.4, 4.4, 3.8, 3.9, 4.8,
4.4, 4.9, 5, 4.5, 3.9, 4.4, 5.4,
4.6, 5.6, 5, 4.7, 4.3, 5.1, 5.4,
5.5, 5.7, 5.8, 5.7, 4.5, 5.5, 5.6,
5.9, 6.2, 6.2, 6.3, 5.5, 6.4, 6.3,

Homework Equations

The Attempt at a Solution

Didnt know where to start

 

[awvvu]

What does the GCD of non-integers even mean? But the first step would be to remove duplicates and possibly sort them.

edit: they appear to be in order going vertically. Dunno what that means though.