Multiple choice general knowledge "Odd Man Out' - A Sitter.. 17 256 65536 4294967296 Reveal answer Fill a bubble to check yourself A Correct answer Explanation This is an odd man out based on powers of 2. 256 is 2^8 65536 is 2^16 and 4294967296 is 2^32. 17 is not a power of 2 so it's the odd one out. 17 is a prime number while all others are powers of 2.