It's 2 or 4 i'm not sure
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I, H, N, O, S, X & Z all have rotational symmetry.
No. The only uppercase letters with rotational symmetry are H I N O S X Z Lowercase are l o s x z (and t depending on how it's drawn)
A B C D E H K M U V W X Y * * * * * What? Most of these letters do not have rotational symmetry and so cannot have rotational AND line symmetry. Or did the meaning of AND change last night? The only upper case letters with both are H, I, O, X
H, I, N, O, S, X, and Z.
If you mean the letter x, it has four lines of symmetry.