Find the odd man out.
41, 43, 47, 53, 61, 71, 73, 81

A. 61 B. 71
C. 73 D. 81

• all are prime no. except 81
  
• 12 years agoHelpfull: Yes(0) No(3)
• 81 is odd...
• 10 years agoHelpfull: Yes(0) No(2)
• there is an difference of even no
  43-41=2
  47-43=4
  53-47=6
  61-53=8
  71-61=10
  *73-71=2
  
  so 73 is odd
• 9 years agoHelpfull: Yes(0) No(0)