Assuming "rotational symmetry" means looks identical when rotated 180 degrees.
H I N O S X Z
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H, I, N, O, S, X, Z
1. England2. Japan3. Canada4. Argentina5. Dominican Republic6. Hong Kong (rotational symmetry)7. Israel8. Jamaica9. Belgium (Not including colour)10. Olympics (Not including colour)
I think 7 although i'm not certainly sure, i'm sure that is between 7 or 9.
No numerical 7 has no lines of symmetry or 'mirror image'
It has 7 lines of symmetry