None. They are all just letters.
7 have rot
Eleven of them - AHIMOTUVWXY
Seven
In the English alphabet, the uppercase letters that have perpendicular line segments are A, B, D, E, F, H, K, L, T, and Z. This totals to 10 uppercase letters. Each of these letters includes at least one pair of line segments that meet at a right angle.
It really depends on how you write the letters. I count nine if there're all uppercase, but that's my handwriting.
If you mean horizontally asymmetrical there are 15: BCDEFGJKLNPQRSZ If you mean vertically asymmetrical there are 17: AFGJLMNPQRSTUVWYZ
There are seven: B, H, I, O, S, X, Z
26 x 25 x 24 = 15600
There are 26 letters in the alphabet.
the alphabet has 26 letters in it
The official Philippine alphabet has 28 letters.
The English language alphabet has 26 letters.