8,5,9,7,2,25,5,1,16,8,6,?

• 4
  
  (8,5,9),(7,2,25),(5,1,16),(8,6,x)
  
  (a,b,c) => (a-b)^2 = c
  
  (8 - 5)^2 = 9
  (7 - 2)^2 = 25
  (5-1)^2 = 16
  => (8 - 6)^2 = x => x = 4
• 11 years agoHelpfull: Yes(129) No(5)
• 8-5=3-->3^2=9
  7-2=5-->5^2=25
  ......
  8-6=2-->2^2=4
  ans = 4
• 11 years agoHelpfull: Yes(11) No(2)
• 4
  1st term - 2nd term=x, and we can get 3rd term like x^2
  (8-5)=3, 3^2=9
  .
  .
  similarly 8-6=2, 2^2=4
• 11 years agoHelpfull: Yes(5) No(3)
• 8-5 = 3, 3^2 = 9
  7-2 = 5, 5^2 = 25
  5-1 = 4, 4^2 = 16
  8-6 = 2, 2^2 = 4
  Ans is : - 4
• 11 years agoHelpfull: Yes(2) No(1)
• 4
  (8 - 5)^2 = 9
  (7 - 2)^2 = 25
  (5-1)^2 = 16
  (8 - 6)^2= 4
• 8 years agoHelpfull: Yes(1) No(0)
• 8-5 = 3, 3^2 = 9
  7-2 = 5, 5^2 = 25
  5-1 = 4, 4^2 = 16
  8-6 = 2, 2^2 = 4
  
• 8 years agoHelpfull: Yes(1) No(0)