Q. What is the next number of the following sequence.
6, 9, 18, 45, 108, 351, ..

• For odd place values
  6*3=18
  18*6=108
  108*9=972
  and for even place values
  6*1+ 3^1=9
  18*2+3^2=45
  108*3+3^3=351
  972*4+3^4=39699(so ans is 972)
• 10 years agoHelpfull: Yes(25) No(3)
• 6, 9(6+3^1), 18(6*3), 45(18+3^3), 108(18*6), 351(108+3^5), 972(108*9), 1701(972+3^7), ….
• 9 years agoHelpfull: Yes(1) No(1)
• difference between the series numbers is- 3,9,27,81,243,729
• 9 years agoHelpfull: Yes(1) No(5)
• difference between the series numbers is- 3,9,27,81,243,729
  so 351+729= 1080
• 7 years agoHelpfull: Yes(0) No(1)
• For odd place values
  6*3=18
  18*6=108
  108*9=972
  and for even place values
  6*1+ 3^1=9
  18*2+3^2=45
  108*3+3^3=351
  972*4+3^4=39699(so ans is 972)
• 6 years agoHelpfull: Yes(0) No(0)