the answer is U O S H K Z X N A D=2 0R MORE LINES OF SYMMETRY
7 have rot
In caps there is 1. lower case none.
zero, all the keys have different letters, numbers, or symbols
Not many. Depending on how you write, the letters L, O, Q, and X can have diagonal lines of symmetry.
4 Lines of symmetry
Seven
7 have rot
Eleven of them - AHIMOTUVWXY
O and X And H and I (Note "O" has many, actually an infinite number of, lines of symmetry)
There are seven: B, H, I, O, S, X, Z
Five.H , I , O , X( ' O ' has 2 lines of symmetry and more besides and ' X ' has 4 )
It really depends on how you write the letters. I count nine if there're all uppercase, but that's my handwriting.
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
None. Some letters have one or more but all the letters, taken as a set, have none.
In caps there is 1. lower case none.
zero, all the keys have different letters, numbers, or symbols
Not many. Depending on how you write, the letters L, O, Q, and X can have diagonal lines of symmetry.