what is the 8th term in the series 1,4,9,25,35,63

• 1,4,9,18,35,68 series is that
  1=(2^1-1) ,4=(2^2-0), 9=(2^3+1), 18=(2^4+2) .35=(2^5+3) ,68=(2^6+4) so 8th term is 2^8+6=262
  
• 10 years agoHelpfull: Yes(42) No(33)
• Answer is 78.
  1, 4, 9, 25, 35, 63, 78.
  
  Explanation:
  first find the difference between each no: 4-1=3, 9-4=5, 25-9=16, 35-25=10, 63-35=28.
  Now write all the differences in a series,
  3, 5, 16, 10, 28
  now just follow the differences series alternatively like : 3, 16, 28 and 5, 10
  
  if u see the 3,16,28 series its gradually decreasing with some no with 13 and 12 and the next difference can be expected as 11.
  
  and if u see the 5,10 series its gradually increasing as with 5 difference so the next no can be expected as 15.
  but we need the next no to the 63 in the main given series.
  So, for the next no to the 63 is 78 by following the 5,10,15 series.
  
  therefore, 63+15=78 is the required answer.
• 10 years agoHelpfull: Yes(24) No(11)
• 117 is the right answer as he asked 8th term in the series..78+39=117
  
• 10 years agoHelpfull: Yes(13) No(2)
• this is wrong question
  
• 10 years agoHelpfull: Yes(9) No(8)
• @akash gupta: but the qus is 1,4,9,25,35,63 not 68???
• 10 years agoHelpfull: Yes(4) No(2)
• @SAI this was the same question asked in infosys....1,4,9,18,35,68
• 10 years agoHelpfull: Yes(3) No(1)
• wrong question
• 10 years agoHelpfull: Yes(3) No(2)
• Series is 1, 4, 9, 18, 35, ?,
  
  Sol:-
  
  2nd number: 1 x 2 + 2 = 4
  
  3rd number: 4 x 2 + 1 = 9
  
  4th number: 9 x 2 + 0 = 18
  
  5th Number: 18 x 2 -1 = 35
  
  hence the answer;
  
  i.e. 6th Number = 35 x 2 – 2 = 68
• 7 years agoHelpfull: Yes(3) No(2)
• it should be 1,4,9,25,35,63...
  then 8th term is 262
• 9 years agoHelpfull: Yes(2) No(0)
• The solution is from the death valley summoned by Mr. The Undertaker and approved by his Bro Kane. Hence,by virtue of Triple H and Mark henry,THE WEIGHT OF THIS QUESTION IS SIMPLY EMOTIONALLY UNBEARABLE!! COPYRIGHT CLAIM!!
• 8 years agoHelpfull: Yes(1) No(1)
• 99
  1=1^2;4=2^2;9=3^2;25=5^2;
  35=6^2-1;63=8^2-1;99=10^2-1;;
• 10 years agoHelpfull: Yes(0) No(3)
• Answer is 78
• 7 years agoHelpfull: Yes(0) No(0)