श्रृंखला में लुप्त संख्या ज्ञात कीजिए: $5, 11, ?, 55, 117$.

  • A
    $21$
  • B
    $27$
  • C
    $23$
  • D
    $25$

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$320, 320, 314, 290, 230, ?$

$5824, 5242, ?, 4247, 3823$

श्रृंखला में लुप्त पद ज्ञात कीजिए: $2.5, 4, ?, 10, 14.5, 20, 26.5$.

दी गई श्रृंखला में विषम संख्या ज्ञात कीजिए: $864, 420, 200, 96, 40, 16, 6$.

$10, 14, 25, 55, 140, ?$

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