Question
Glen gave 311 of his cards to Liam, 211 of his cards to Daniel and 311 of his cards to Luis. He then had 21 cards left. How many cards had he at first?
4 m

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Glen gave 311 of his cards to Liam, 211 of his cards to Daniel and 311 of his cards to Luis. He then had 21 cards left. How many cards had he at first?