28,17,23,17,26,16,22,16,24,15,21,15
options:
15
20
22
23
16

• 22 is the answer
  
• 9 years agoHelpfull: Yes(7) No(0)
• 22
  Decreasing number by2
  28 26 24 22
  
  
• 9 years agoHelpfull: Yes(1) No(0)
• 23is the answer
• 9 years agoHelpfull: Yes(0) No(0)