4, 3, 5, 9, 12, 17, ?

a)32
b)30
c)24
d)26
e)22

• in this series 4+5=9,3+9=12,12+5=17 n the next number is
  17+9=26(option d)
• 13 years agoHelpfull: Yes(20) No(0)
• given sereies 4,3,5,9,12,17
  then alternative nums adition gives the followed num
  4+5=9,9+3=12,12+5=17,17+9=26
  option (d) is the ans
• 13 years agoHelpfull: Yes(7) No(1)
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• 9 years agoHelpfull: Yes(6) No(1)
• Split the given series into two
  (4, 5, 12)---------> diff is 1,7
  (3, 9, 17)---------> diff is 6,9
  
  Now add 14 to the number 12
  12+14=26
• 9 years agoHelpfull: Yes(2) No(1)
• 24
  (24+12)/2=17
• 10 years agoHelpfull: Yes(1) No(2)
• alternative series:
  48-42=6
  42-x=8
  x=34
  ans is 34.
  if not correct me
• 9 years agoHelpfull: Yes(1) No(2)
• 26 is the right answer
• 8 years agoHelpfull: Yes(1) No(0)
• answer is 26
  4+5=9,
  3+9=12,
  12+5=17
  17+9=26
• 9 years agoHelpfull: Yes(0) No(0)
• (4,5,12)(3,5,17)
  so for (4 5 12)=4*1+1=5 =>(4+1)=5
  5*2+2=12=>(5+2)=7
  7*3+3=24
  so ans is 24
• 7 years agoHelpfull: Yes(0) No(0)