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Modular Arithmetic
medium
0:00.0
Calculate
(
20
×
20
)
(
m
o
d
9
)
(20 \times 20) \pmod 9
(
20
×
20
)
(
mod
9
)
.
A
4
4
4
B
1
1
1
C
2
2
2
D
0
0
0
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