2021 AMC 10B Problems/Problem 16
Call a positive integer an uphill integer if every digit is strictly greater than the previous digit. For example,
and
are all uphill integers, but
and
are not. How many uphill integers are divisible by
?
Call a positive integer an uphill integer if every digit is strictly greater than the previous digit. For example,
and
are all uphill integers, but
and
are not. How many uphill integers are divisible by
?
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