Question
Jack folded 25 paper swans on the first day. Each day he did 10 more paper swans than the previous day. On the last day, he made 125 swans. How many days did he fold paper swans?
2 m

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Jack folded 25 paper swans on the first day. Each day he did 10 more paper swans than the previous day. On the last day, he made 125 swans. How many days did he fold paper swans?