1, 9, 25, 49, ?, 121

A. 64 B. 81
C. 91 D. 100

• B.81
  
  Series consists of square of ODD numbers.
  
  --> 1^2, 3^2, 5^2, 7^2, 9^2, 11^2
  --> 1 , 9 , 25 , 49 , 81 , 121
  
  1, 9, 25, 49, 81, 121
• 12 years agoHelpfull: Yes(2) No(1)
• The given sequence of Square of the odd numbers,
  1^2,3^2,5^2,7^2,9^2,11^2
  (i.e)1,9,25,49,81,121
  Answer: (B)81
• 12 years agoHelpfull: Yes(1) No(0)
• 1^2, 3^2, 5^2, 7^2, 9^2, 11^2
  So, Ans is 81
  Option B
• 10 years agoHelpfull: Yes(1) No(1)
• 1^2,3^2,5^2,7^2,9^2,11^2
  (i.e)1,9,25,49,81,121
  Answer: (B)81
• 10 years agoHelpfull: Yes(1) No(0)
• B.81
  this is in odd numbers series: 3,5,7,?,11
  square of numbers: 9,25,49,81,121
• 8 years agoHelpfull: Yes(0) No(0)