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Turning words into arithmetic means naming the unknown, then writing what the sentence says about it in symbols. Three more than twice a number is not the same as twice three more than a number, and the order the words arrive in is not always the order of the operations.
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Nothing. This is one of the skills the Atlas starts from.
No indexed official paper question has been tagged with MOD-01 yet. The index grows one paper at a time, and it records only question numbers, point values and our own skill tags — never the problems themselves.