30,28,25,20,34,28,?

• 30,25,34,x
  -5,+9,-5,+9..........
  28,20,28
  =>-8,+8,-8............
  ans is 29
• 10 years agoHelpfull: Yes(31) No(10)
• 30, (28,25), 20, (34,28), ?
  28-25 = 3 = 3 * 1,
  34-28 = 6 = 3 * 2,................ and so on.......
  30-10 = 20,
  20-10 = 10,
  So the answer is 10.
• 9 years agoHelpfull: Yes(17) No(5)
• Ans 21
  Exp:
  30,28,25,20,34,28,?
  diff bw is -2, -3, -5 & -6, -7
  then 28-7=21
• 11 years agoHelpfull: Yes(14) No(68)
• 30(28,25),20(34,28),10(40,31).
• 9 years agoHelpfull: Yes(2) No(7)
• 30-25=5
  34-25=9
  9-5=4
  9+4=13
  34-13=21(ans)
• 8 years agoHelpfull: Yes(2) No(7)
• ans =
  21
• 7 years agoHelpfull: Yes(1) No(1)
• I think 26
• 8 years agoHelpfull: Yes(0) No(11)