Question

give an example of hydrocarbon other than pentane having more than three isomers

Answer 1

Yes, it is possible having More than three isomers irrespective of pentane

Hexane C6H14,
1.Hexane
2.2-methylpentane
.3-methylpentane
4.2-2 Dimethylbutane
5.2-3 Dimethyl butane

Hope , that it will help you in better understanding and clear your confusions,doubts,etc.

Answer 2

Explanation:

They are:

1-hexane

2-methylpentane

3-methylpentane