Complete the series 1 , 9 , 25 , 49 ,___ , 121

A) 71

B) 61

C) 81

D) 91

  • 1*1 = 1
  • 3*3 = 9
  • 5*5 = 25
  • 7*7 = 49
  • 9*9 = 81 (Ans)

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