There is a class of improper fractions whose numerator is 57. The numerator and denominator are co-prime numbers. After converting to a decimal, it is exactly a two-digit decimal. Convert all qualified false fractions into mixed fractions, what is the possible denominator of qualified mixed fractions
有一类假分数的分子是57．分子和分母是互质数．化成小数后恰好是一个两位小数．把符合条件的假分数都化成带分数，符合条件的带分数的分母可能是多少
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