7th number in the series....
99,18,36,9,18

• its 7 th number in the series 99,18,36,9,18,_,?
  
  99 18.....9+9=18*2=36
  36 9.......3+6=9*2=18
  18 ?........1+8=9*2=18
  ans is 18
• 8 years agoHelpfull: Yes(41) No(10)
• 99 18.....9+9=18*2=36
  36 9.......3+6=9*2=18
  18 ?........1+8=9*2=18
  
  so answer is 9
• 8 years agoHelpfull: Yes(18) No(16)
• 18 is the ans.
  exp:-
  9+9=18
  18*2=36
  3+6=9
  9*2=18
  1+8=9
  9*2=18
  hence the ans is 18
  
• 8 years agoHelpfull: Yes(12) No(3)
• its 7th no. so be carefull while solving. answer is 18
• 8 years agoHelpfull: Yes(7) No(2)
• 99 gives 9+9=18 (2nd no.)
  next 18x2=36 (3rd no.)
  next 3+6=9 (4th no.)
  next 9x2=18 (5th no.)
  next 1+8=9 (6th no.)
  next 9x2=18 (7th no.)
  
• 8 years agoHelpfull: Yes(6) No(0)
• 
  99 18 . . . 9+9 = 18
  36 9 . . . 3+6 = 9
  18 ? . . . .1+8 = 9
  
  So I'm going with 9.
• 8 years agoHelpfull: Yes(5) No(6)
• 99,9+9,36,3+6,9,1+8,9
• 8 years agoHelpfull: Yes(3) No(4)
• 9+9=18
  18*2=36
  3+6=9
  9*2=18
  1+8=9
  9*2=18
• 8 years agoHelpfull: Yes(3) No(0)
• 9+9=18*2=36=3+6=9*2=18=1+8=9
  
  
  hence answer is 9
• 8 years agoHelpfull: Yes(2) No(5)
• Answer is 1 as 7th term is asked in que....
  
  99 18 36 9 18 9 18
• 8 years agoHelpfull: Yes(1) No(0)
• its 7 th number in the series 99,18,36,9,18,_,?
  for second term add first term two digits separately and for third term multiple with 2 to second term repeat the process till you get 7th term
• 8 years agoHelpfull: Yes(1) No(0)
• 9+9 = 18
  18*2=36
  3+6=9
  9*2=18
  1+8=9
  9*2=18
  
  99,18,36,9,18,9,18
• 8 years agoHelpfull: Yes(1) No(0)
• 99 =9+9=18
  36=3+6=9
  18=1+8=9
  therefore solution is 9
• 8 years agoHelpfull: Yes(1) No(1)
• Sum of numbers of 1st term gives 2nd term ie, 9+9=18, and then 2nd term multiplied by 2 gives 3rd term, ie, 18*2=36, then sum of numbers of 3rd term gives 4th term, then 4th term times 2 gives 5th term, then sum of numbers of 5th term gives 6th term and then 6th term multiplied by 2 gives 7th term. So 7th term is 18
• 7 years agoHelpfull: Yes(1) No(0)
• 9 because first term is the addition of digit and second term is multiply by 2 of it
  example first term is 99 so second term is addition of digit 9+9=18
  third term is obtained by multiplying by 2 18*2=36
  similarly
• 7 years agoHelpfull: Yes(1) No(1)
• 9 since first term is 99 we can see that second term is the sum of digit of first and third is 2 multiple of second similarly eg
  99 so second 9+9=18
  third 2*18=36
  fourth=3+6=9
• 7 years agoHelpfull: Yes(1) No(1)
• 18
  9+9=18
  18*2=36
  3+6=9
  9*2=18
  1+8=9
  9*2=18
• 6 years agoHelpfull: Yes(1) No(0)
• 9+9=18
  18*2=36
  3+6=9
  9*2=18
  1+8=9
  9*2=18
  7th number=18
• 6 years agoHelpfull: Yes(1) No(0)
• 18
  9+9:18, 18*2:36
  3+6:9, 9*2:18
  1+8:9,9*2:18
• 8 years agoHelpfull: Yes(0) No(0)
• It is dual series sum of first series is the 2nd series
• 8 years agoHelpfull: Yes(0) No(1)
• 7 th no is asked so ans is 18..6th no will be 9
• 8 years agoHelpfull: Yes(0) No(1)
• 99,18,36,9,18,9,0
  
• 8 years agoHelpfull: Yes(0) No(2)
• 99 18..... 9+9=18*2=36
  99 18 36....... 1+8=9*1=9
  99 18 36 9...... 3+6=9*2=18
  99 18 36 9 18 .......9+0=9*1=9
  99 18 36 9 18 9...
  
  so the ans is 9
• 7 years agoHelpfull: Yes(0) No(1)
• the answer is 9
• 7 years agoHelpfull: Yes(0) No(1)
• answer is 9
• 7 years agoHelpfull: Yes(0) No(1)
• 99 - 81 = 18
  18 * 2 = 36
  36 - 27 = 9
  9 * 2 = 18
  18 - 9 = 9
  
  Gonna go with 9.
• 6 years agoHelpfull: Yes(0) No(0)