2.4. Repeating Expired Cards
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## 2.4. Repeating Expired Cards

For calculating the validity time of a learned card Pauker uses the following formula:

validity = ebatchnumber-1 days

When cards of the current lesson are expired, the button “Repeat Expired Cards” can be used. This will run through the expired cards as described above.

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2.3. Learning New Cards | Home | 2.5. Editing Cards