Answer:
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
I am pronounced as one letter, written with three. I come in blue, black, brown, or grey. Reverse me and I read the same either way. What am I?
I ask no questions but receive a lot of answers. What am I?
What word sounds the same even after you take away four of its five letters?
I no longer have eyes, but once I did see. Once I had thoughts, but now Iām white and empty. What am I?
I am a rock group with four members. All dead one was assassinated.