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1, 4, 9, 16, 25, 36, 49, … 81

  • A.100
  • B.121
  • C.64
  • D.144

Answer: C

Correct answer: 64

The terms are the squares in order, \( 1^2 \) to \( 7^2 \), so the next is \( 8^2 = \mathbf{64} \), followed by \( 9^2 = 81 \).

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