Question
Cole gave 211 of his erasers to Japheth, 311 of his erasers to Xavier and 311 of his erasers to Tom. He then had 18 erasers left. How many erasers had he at first?
4 m

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Cole gave 211 of his erasers to Japheth, 311 of his erasers to Xavier and 311 of his erasers to Tom. He then had 18 erasers left. How many erasers had he at first?