Question
David folded 10 paper rabbits on the first day. Each day he did 2 more paper rabbits than the previous day. On the last day, he made 30 rabbits. How many days did he fold paper rabbits?
2 m

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David folded 10 paper rabbits on the first day. Each day he did 2 more paper rabbits than the previous day. On the last day, he made 30 rabbits. How many days did he fold paper rabbits?