How many digits 2^200 has?  Pick one
A) 31 B) 61 C) 50 D) 99 E) 101

Rationale: "2 ^ 10 = 1.024 * 10 ^ 3 = > 2 ^ 100 = ( 1.024 ) ^ 10 * 10 ^ 60 therefore 61 digits would be my best guess b"
Answer: B