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10, 100, 200, 310, ?

  • A.400
  • B.410
  • C.420
  • D.430

Answer: D

Correct answer: 430

The gaps rise by ten each time: \( 100-10=90 \), \( 200-100=100 \), \( 310-200=110 \). The next gap is 120, giving \[ 310 + 120 = \mathbf{430} \]

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