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Austin's Stationery sells thank-you cards in packs of 8 and birthday cards in packages of 4. Surprisingly, the store sold the same number of each type of card this month. What is the minimum number of each card type that the store must have sold?

User Mharlin
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The LCM is 8, so the store must have sold at least 8 of each type of card.
User Powell
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