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125,80,45,20,?

  • A.5
  • B.8
  • C.10
  • D.12

Answer: A

Correct answer: 5

The amounts taken away shrink by ten each time: \( 125-80=45 \), \( 80-45=35 \), \( 45-20=25 \). The next subtraction is 15, giving \[ 20 - 15 = \mathbf{5} \]

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