1,4,13,28,49...............

• 4-1=3
  13-4=9
  28-13=15
  49-28=21
  difference increase by 6
  21+6=27
  next number of series=49+27=76
  ans 76
• 11 years agoHelpfull: Yes(4) No(0)
• 4-1=3
  13-4=9
  28-13=15
  49-28=21
  76-49=27
  3*1=3,3*3=9,3*5=15,3*7=21,3*9=27
  so ans iz 27+49=76
• 8 years agoHelpfull: Yes(0) No(0)
• 76
  ..
  /*4-1=3
  13-4=9
  28-13=15
  49-28=21;all are multiples of 3.so the next number is 3*9=21;then 21+49=76.so 76 is answer.
• 8 years agoHelpfull: Yes(0) No(0)