Question
Ivan gave 311 of his erasers to Peter, 311 of his erasers to Bryan and 211 of his erasers to Jack. He then had 24 erasers left. How many erasers had he at first?
4 m

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Ivan gave 311 of his erasers to Peter, 311 of his erasers to Bryan and 211 of his erasers to Jack. He then had 24 erasers left. How many erasers had he at first?