Question
Ahmad gave 111 of his stamps to Dylan, 311 of his stamps to Mark and 311 of his stamps to Ryan. He then had 20 stamps left. How many stamps had he at first?
4 m

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Ahmad gave 111 of his stamps to Dylan, 311 of his stamps to Mark and 311 of his stamps to Ryan. He then had 20 stamps left. How many stamps had he at first?