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22, 24, 28, ?, 52, 84

  • A.36
  • B.38
  • C.42
  • D.46

Answer: A

Correct answer: 36

The gaps double each time: \( 24-22=2 \), \( 28-24=4 \), then 8, 16 and 32. So the missing term is \[ 28 + 8 = \mathbf{36} \] and \( 36+16=52 \), \( 52+32=84 \), as shown.

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