Complete the series....3,8,15,35,63,__,__ ?

• 143, 255
  
  Alternate series, 3 ,15, 63, 255, .... & 8, 35, 143, ....
  Explanation: (3*4+3=15), (15*4+3=63), (63*4+3=255), & (8*4+3=35), (35*4+3=143), ...
• 9 years agoHelpfull: Yes(6) No(2)
• The given series contains 2 sequences as (3,15,63,.....) and (8,35,......)
  Now for the first sequence (3*4+3=15, 15*4+3-63 in the same way 63*4+3=255)
  Same as for the second sequence (8*4+3=35, 35*4+3=143)
  So the answer is
  3,8,15,35,63,143,255
• 9 years agoHelpfull: Yes(1) No(3)