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Mathematics
Mathematics
Problem
Let
A
=
{
1
,
2
,
3
,
4
,
5
,
6
}
A=\{1,2,3,4,5,6\}
A
=
{
1
,
2
,
3
,
4
,
5
,
6
}
. Determine the number of ordered pairs
(
a
,
b
)
∈
A
×
A
(a,b)\in A\times A
(
a
,
b
)
∈
A
×
A
such that
a
a
a
is a multiple of
b
b
b
.
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