Question

What is a number greater than 18. 55 and less than 18. 6

Answer 1

18.58 is between 18.55 and 18.6

Answer 2

It's not hard to find one of those, since there are
an infinite number of them.  Here are a few:

18.55000001
18.56
18.57
18.58
18.59
18.591
18.59100001
18.59100002
18.59100003
18.59100004
18.59100005
18.5910006
18.591007
18.59108
18.5919
18.59191
18.59192
18.59193
.
.
etc.