જો $A = \left(\frac{1}{0.4}\right) + \left(\frac{1}{0.04}\right) + \left(\frac{1}{0.004}\right) + \dots$ $8$ પદો સુધી હોય,તો $A$ ની કિંમત શું છે ($.5$ માં)?

  • A
    $27272727$
  • B
    $25252525$
  • C
    $27777777$
  • D
    $25555555$

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શ્રેણીમાં ખોટી સંખ્યા શોધો: $2, 5, 18, 19, 24, 29, 34$.

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