Question
Kathy bought 6 packs of cards. There were 35 cards in each pack. After she had given 100 cards to Tiffany, 33 to Riordan and some to Pierre, she had 310 of the cards left. How many cards did she give to Pierre?
4 m

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Kathy bought 6 packs of cards. There were 35 cards in each pack. After she had given 100 cards to Tiffany, 33 to Riordan and some to Pierre, she had 310 of the cards left. How many cards did she give to Pierre?