1. 3, 22, 7, 45, 15,? , 31
a) 91 b)151 c) 90 d) 5

• Ans 91
  
  sol: this is combination of two series 3, 7, 15, 31 and 22, 45,.....
  both are n*2+1 series so next term will be 22*2+1=91
• 13 years agoHelpfull: Yes(5) No(1)
• there is two series
  3 7 15 31
  &
  22 45 91
• 13 years agoHelpfull: Yes(3) No(0)
• 3,22,7,45,15,-,31
  divide in to 2 parts so 3,7,15,31 here th edifference is doubled
  next series 22,45,91(here also diff wl doubled)
• 13 years agoHelpfull: Yes(3) No(0)
• here we have two series those are
  3,7,15,31...
  22,45,?
  solving this by using the formula 2n+1
  then n=22 then 2*22+=45---->n=45 then 2*45+1=91
  the answer is (a) 91
• 10 years agoHelpfull: Yes(0) No(0)