15 51 216 1100 ? 46452
a) 6630 b) 6650 c) 6560 d) 6530 e) None of these

• let first no. be "x" and multiple be "y"...start value of y with 3
  
  then,
  
  [(x*y)+{y*(y-1)}]
  
  example:
  
  15*3+3*2=51
  51*4+4*3=216
  216*5+5*4=1100
  1100*6+6*5=6630
  6630*7+7*6=46452
• 12 years agoHelpfull: Yes(43) No(1)
• The Answer is 6630
  The format of the series
  15*3+6=51
  51*4+12=216
  216*5+20=1100
  1100*6+30=6630
  6630*7+42=46452
• 13 years agoHelpfull: Yes(39) No(9)
• The Answer is 6630
  The format of the series
  15*3+6=51
  51*4+12=216
  216*5+20=1100
  1100*6+30=6630
  6630*7+42=46452.
  
• 8 years agoHelpfull: Yes(1) No(1)
• answer is a) 6630
  solution is:-
  15*3+6=51
  51*4+12=216
  216*5+20=1100
  1100*6+30=6630
  6630*7+42=46452
• 7 years agoHelpfull: Yes(0) No(0)