Question
Justin folded 15 paper guns on the first day. Each day he did 8 more paper guns than the previous day. On the last day, he made 79 guns. How many days did he fold paper guns?
2 m

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Justin folded 15 paper guns on the first day. Each day he did 8 more paper guns than the previous day. On the last day, he made 79 guns. How many days did he fold paper guns?