What is the missing number in the below series? 9, 15, 23, 33, ?
a)47
b)43
c)40
d)45
e)50

• 45
  
  
  9, 15, 23, 33, ?
  15-9=6
  23-15=8
  33-23=10
  
  hence next term will be 33+12=45 ... option d)
• 13 years agoHelpfull: Yes(9) No(0)
• 9+6=15
  15+8=23
  23+10=33
  33+12=45
• 7 years agoHelpfull: Yes(0) No(0)
• 45 is the answer as the common difference is incerasing by 2 in every step
• 7 years agoHelpfull: Yes(0) No(0)
• 9,15,23,33,?
  15-9=6
  23-15=8
  33-23=10
  ? = 33+12 = 45
• 7 years agoHelpfull: Yes(0) No(0)
• 9+6=15
  15+8=23
  23+10=33
  33+12=45
• 7 years agoHelpfull: Yes(0) No(0)
• 9+6+0=15
  15+7+1=23
  23+8+2=33
  so ,33+9+3=45
• 7 years agoHelpfull: Yes(0) No(0)
• Since, the series 9,15,23,33
  Are at a difference of
  6=2^2+2
  8=2^2+4
  10=2^2+6
  The next will be
  12=2^2+8
  So, tht will be (33+12=45)
• 7 years agoHelpfull: Yes(0) No(0)