Question
Riordan gave 111 of his buttons to Ahmad, 311 of his buttons to Jeremy and 211 of his buttons to Simon. He then had 35 buttons left. How many buttons had he at first?
4 m

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Riordan gave 111 of his buttons to Ahmad, 311 of his buttons to Jeremy and 211 of his buttons to Simon. He then had 35 buttons left. How many buttons had he at first?