Question
George gave 211 of his pens to Simon, 311 of his pens to Vaidev and 211 of his pens to Julian. He then had 20 pens left. How many pens had he at first?
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George gave 211 of his pens to Simon, 311 of his pens to Vaidev and 211 of his pens to Julian. He then had 20 pens left. How many pens had he at first?