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Modular Arithmetic
hard
0:00.0
How many solutions are there to
x
2
≡
x
(
m
o
d
12
)
x^2 \equiv x \pmod{12}
x
2
≡
x
(
mod
12
)
?
A
4
4
4
B
2
2
2
C
1
1
1
D
0
0
0
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