3, 12, 7, 26, 15, ?
a)54 b)27 c)108 d)31

• 3*2 + 1=7
  7*2 + 1=15
  
  12*2 + 2=26
  26*2 + 2=54
  
  so 54 ans...
• 12 years agoHelpfull: Yes(5) No(0)
• answer is 54 as above question
  3,7,15 diff b/w two is like 4,8,..
  and 12,26 diff is 14 so according that 14*2=28 will added to 26
  26+28=54
• 12 years agoHelpfull: Yes(1) No(0)
• 54 is d ans
• 12 years agoHelpfull: Yes(0) No(0)
• 54.....bcoz of 26*2+2
• 12 years agoHelpfull: Yes(0) No(0)
• 91
  3,-,3*2+1,-,(3*2+1)*2+1,-,...
• 12 years agoHelpfull: Yes(0) No(0)
• 3*2+1=7
  12*2+2
  26*2+2=54
  
  so ans is 54
• 12 years agoHelpfull: Yes(0) No(0)