1, 9, 25, 49, 81, ?

A. 100 B. 112
C. 121 D. 144

• C. 121
  
  Series contains square of consecutive odd numbers.
  
  1^2,3^2,5^2,7^2,9^2,11^2
  
  
• 13 years agoHelpfull: Yes(3) No(0)
• C.121
  the series is +8,+16,+32,+40.....
  therefore 81+40=121
• 13 years agoHelpfull: Yes(0) No(1)