2, 7, 27, 107, 427, ?

A. 1262 B. 1707
C. 4027 D. 4207

• B. 1707
  
  2
  2 +(5) = 7
  7 +(5*4) = 27 (where 5 is difference between 1st and 2nd term)
  27 +(20*4) = 107 (where 20 is difference between 2nd and 3rd term)
  107 +(80*4) = 427 (where 80 is difference between 3rd and 4th term)
  427 +(320*4)= 1707(where 320 is difference between 4th and 5th term)
  
  Final sequence = 2, 7, 27, 107, 427,1707
• 12 years agoHelpfull: Yes(0) No(1)
• b.1707.
  2*4-1=7.
  7*4-1=27.
  27*4-1=107.
  107*4-1=427.
  427*4-1=1707.
  
• 12 years agoHelpfull: Yes(0) No(0)