Complete the series
1 3 7 13 15 19 25 27 31 37 ____

• 39 43 49
  1+2=3+4=7+6=13
  13+2=15+4=19+6=25
  25+2=27+4=31+6=37
  37+2=39
• 12 years agoHelpfull: Yes(2) No(0)
• 1+2=3
  3+4=7.
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  37+2=39
• 9 years agoHelpfull: Yes(0) No(0)
• 39. (2,4,6) difference cycle is repeating
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• 39....The difference between each number is in the series..2,4,6
  So 37+2=39
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• 39 is the ans
  because the seriesis in the form of +2,+4,+6 in repeat
• 9 years agoHelpfull: Yes(0) No(0)