3,22,7,45,15,?,31

• It Consists 2 Series...3,7,15,32 One Series 22,45,X Another Series...Both Follow Same Rule 3*2+1=7,7*2+1=15,15*2+1=31
  22*2+1=45 sO mISSING nUM Is 45*2+1=91
• 13 years agoHelpfull: Yes(5) No(0)
• ans is 91
  3*2+1=7
  7*2+1=15
  15*2+1=31
  and next series 22*2+1=45,45*2+1=91
• 13 years agoHelpfull: Yes(2) No(2)
• it will be 91.
  logic-there is two series...
  the sequence is in =2*i+1
  1:3,
  7=2*3+1,
  15=2*7+1,
  31=2*15+1
  same order is the second one.22,45,
  so it will be
  2*45+1=91
• 13 years agoHelpfull: Yes(1) No(1)
• in alternate term we find a series
  3+4=7,7+2*4=15,15+2*8=31
  s0 22+23=45,45+2*23=91
  so missing term is 91
• 13 years agoHelpfull: Yes(1) No(1)
• 3,22,7,45,15,91,31
  
  as u can see ever 1 digit*2+1=3rd digit and so on by this combination we get the result 91 ie; 45*2+1
• 13 years agoHelpfull: Yes(1) No(0)
• 3*2+7 ->7, 7*2+1 ->15 similarly
  22*2+1 ->45 so ans is 45*2+1=91
• 13 years agoHelpfull: Yes(0) No(0)
• 91, as it follows a series of no.*2+1, eg.22*2+1=45,45*2+1=91
• 13 years agoHelpfull: Yes(0) No(0)
• it is a fibbonacci series...whch cnsists of 2 series in itself..in this ques 1st series is 3,7,15,31 and 2nd series is 22,45,?
  in 1st series we can see that 7-3=4,thn 15-7=8 nd 31-15=16...luking at this we can see that the diff is being multiplied by 2 for the next diff...
  nw 2nd series 45-22=23..so the next diff should be 23*2=46...nd 46+45=91..so 91 is the answer
• 13 years agoHelpfull: Yes(0) No(1)
• ans is 91
  3+4=7,22+23=45,7+8=15,45+46=91,15+16=31
• 13 years agoHelpfull: Yes(0) No(1)
• ans:91
  here 2 pairs are available
  i.e(3,7,15,31) and (22,45,?)
  in first pair 3*2+1=7 7*2+1=15...
  in second pair 22*2+1=45 45*2+1=91
  
• 13 years agoHelpfull: Yes(0) No(1)
• 91 sooooooo simple :)
• 13 years agoHelpfull: Yes(0) No(1)