Modular Arithmetic

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Can you name the answers to these modular arithmetic problems?

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ProblemAnswer
18 ≡ ? (mod 10)
6 ≡ ? (mod 3)
15 ≡ ? (mod 2)
9 ≡ ? (mod 7)
20 ≡ ? (mod 17)
7 + 3 ≡ ? (mod 10)
8 + 4 ≡ ? (mod 10)
10 + 1 ≡ ? (mod 2)
7 + 10 ≡ ? (mod 7)
10 + 1 ≡ ? (mod 4)
4 x 2 ≡ ? (mod 3)
6 x 9 ≡ ? (mod 7)
7 x 8 ≡ ? (mod 9)
4 x 2 ≡ ? (mod 5)
10 x 7 ≡ ? (mod 6)
2 - 5 ≡ ? (mod 10)
13 - 3 ≡ ? (mod 8)
1 - 12 ≡ ? (mod 14)
19 - 1 ≡ ? (mod 6)
17 - 6 ≡ ? (mod 15)
7 + 3 ≡ ? (mod 8)
2 + 11 ≡ ? (mod 6)
2 - 15 ≡ ? (mod 3)
15 + 10 ≡ ? (mod 9)
8 + 8 ≡ ? (mod 17)
ProblemAnswer
9 - 12 ≡ ? (mod 10)
1 - 2 ≡ ? (mod 9)
4 + 14 ≡ ? (mod 4)
6 + 12 ≡ ? (mod 5)
1 - 7 ≡ ? mod 4
1 + 13 ≡ ? mod 7
13 + 16 ≡ ? (mod 14)
29 - 3 ≡ ? (mod 18)
32 + 47 ≡ ? (mod 14)
42 + 32 ≡ ? (mod 20)
15 + 33 ≡ ? (mod 45)
10 + 25 ≡ ? (mod 26)
18 + 42 ≡ ? (mod 50)
1 - 6 ≡ ? (mod 22)
26 x 7 ≡ ? (mod 28)
30 x 22 ≡ ? (mod 4)
14 x 9 ≡ ? (mod 15)
19 x 25 ≡ ? (mod 16)
569 + 66 ≡ ? (mod 406)
400 + 509 ≡ ? (mod 80)
881 + 75 ≡ ? (mod 52)
23^29 ≡ ? (mod 29)
3^10003 ≡ ? (mod 101)
3^516 ≡ ? (mod 1024)
3^3955152236743665 ≡ ? (mod 81)

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