Question
Gabriel folded 60 paper aeroplanes in five days. Each day after the first day, he folded 3 more paper aeroplanes than the day before. How many paper aeroplanes did he fold on the first day?
3 m

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Gabriel folded 60 paper aeroplanes in five days. Each day after the first day, he folded 3 more paper aeroplanes than the day before. How many paper aeroplanes did he fold on the first day?