2001 AMC 10 Problems/Problem 6
Problem
Let and
denote the product and the sum, respectively, of the digits of the integer
. For example,
and
. Suppose
is a two-digit number such that
. What is the units digit of
?
Let and
denote the product and the sum, respectively, of the digits of the integer
. For example,
and
. Suppose
is a two-digit number such that
. What is the units digit of
?
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