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2021 MOAA
4
Accuracy P4
Accuracy P4
Source:
October 16, 2021
MOAA 2021
Accuracy
Problem Statement
Compute the number of two-digit numbers
a
b
‾
\overline{ab}
ab
with nonzero digits
a
a
a
and
b
b
b
such that
a
a
a
and
b
b
b
are both factors of
a
b
‾
\overline{ab}
ab
. Proposed by Nathan Xiong
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