श्रृंखला में लुप्त संख्या ज्ञात कीजिए: $5, 6, 9, 15, ?, 40$.

  • A
    $21$
  • B
    $25$
  • C
    $27$
  • D
    $33$

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दी गई श्रृंखला से विषम संख्या ज्ञात कीजिए: $7, 12, 40, 222, 1742, 17390, 208608$.

$7, 36, 125, 256, ?, 64, 1$

$1050, 420, 168, 67.2, 26.88, 10.752, ?$

श्रृंखला में लुप्त संख्या ज्ञात कीजिए: $120, ?, 60, 20, 5, 1$.

$4, 10, 33, 136, 685, ?$

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