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Find the missing number in the series:
1, 4, 9, 16, 25, ?

  • A.36
  • B.30
  • C.28
  • D.40

Answer: A

Correct answer: 36

Each term is a perfect square of consecutive whole numbers: \[ 1^2 = 1,\quad 2^2 = 4,\quad 3^2 = 9,\quad 4^2 = 16,\quad 5^2 = 25 \] so the next is \( 6^2 = \mathbf{36} \).

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