Related Clues:

• "Hmm ..."
• Not the usual thing
• Like 1, 3, 5, 7, etc.
• "How bizarre"
• One, three or five, e.g.
• Like 2011, but not 2012
• Like a single sock
• Having no matching sock
• Roulette choice
• Like all prime numbers but 2
• 'How ___ ...'
• Not expected
• Like 69
• Not evenly divisible by two
• Like every other number