Next number in the series is 1 , 2 , 4 , 13 , 31 , 112 , ?

• 2-1=1*2+2=4
  13-4=9*2+13=31
  112-31=81*2+112=274
  
• 13 years agoHelpfull: Yes(27) No(3)
• diff betn 1 and 2= 1, 2 and 4= 2 it means 2 is double of 1
  diff bent 4 and 13= 9, 13 and 31= 18 it means 18 is double of 9
  diff bent 31 and 112= 81 112 and x =81's double i.e 162
  so 112+162=274 is ans
• 10 years agoHelpfull: Yes(26) No(1)
• convert these numbers into the base 5.
  
  it means ......
  
  5 | 8
  ----
  1 - 3
  
  
  5 | 16
  -----
  3 - 1
  
  
  5 | 32
  -----
  5 | 6 - 2
  ----
  1 - 1
  
  
  5 | 64
  ----
  5 | 12 - 4
  ----
  2 - 2
  
  So this series going like.. 1, 2, 4, 13, 31, 112, 224, 1003,.....
• 13 years agoHelpfull: Yes(14) No(5)
• 1 2 4 13 31 112 ....
  taking difference of odd positions
  4-1=3
  31-4=27....(3*9=27)
  taking difference of even positions
  13-2=11
  112-13=99(11*9=99)
  therefore,
  27*9=243,
  243+31=274
  ans=274
  
• 10 years agoHelpfull: Yes(9) No(0)
• 1 , 2 ,9 ,18 ,81 ,162
  ans is 162....
• 13 years agoHelpfull: Yes(6) No(10)
• i think it is 274... as difference between 1 & 2 is 1... between 2 & 4 is 2...
  similarly between 4 & 13 is 9 and between 31 & 13 is 18... the ratio is two.... i.e 1:2 , 2:4 ... hence option is 274 as difference between 112-31 & 274-112 is 81 and 162 respectively which is in ratio 1:2
• 9 years agoHelpfull: Yes(2) No(1)
• 1,2,4,13,31,112
  1----
  2----1*2
  4----2*2
  13-----4*2+5
  31-----13*2+5
  112----31*2+50
  274------112*2+50
  
  
  Hence the answer is 274
• 9 years agoHelpfull: Yes(2) No(0)
• i have found an another sol;plz check it
  
  4-1=3=2*1+1
  31-4=27=13*2+1
  x-31=112*3+1=337
  
  so x= 337+31=368 ans. is it in rt way? tell me
  
• 10 years agoHelpfull: Yes(1) No(2)
• when we take difference bw odd and even place then we get 274 ans
• 10 years agoHelpfull: Yes(0) No(0)
• SUNIL KUMAR DONT GIVE RUBBISH ANSWERS U FOOLISH FELLOW
• 9 years agoHelpfull: Yes(0) No(7)
• Answer:224
• 9 years agoHelpfull: Yes(0) No(0)