13,11,14,12,15,13,?

• 13 14 15 16
  11 12 13
  
  Ans 16
• 12 years agoHelpfull: Yes(6) No(0)
• ans=16
  11-13=-2
  14-11=+3
  12-14=-2
  15-12=+3
  13-15=-2
  x-13=+3
  x=16
• 7 years agoHelpfull: Yes(0) No(0)