Question
Flynn folded 19 paper frogs on the first day. Each day he did 10 more paper frogs than the previous day. On the last day, he made 99 frogs. How many days did he fold paper frogs?
2 m

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Flynn folded 19 paper frogs on the first day. Each day he did 10 more paper frogs than the previous day. On the last day, he made 99 frogs. How many days did he fold paper frogs?