Let m1=3,m2=5,m3=7,m4=11, satisfying the conditions of Theorem 1. In this case, M1=5⋅7⋅11,M2=3⋅7⋅11,M3=3⋅5⋅11,M4=3⋅5⋅7. We will find Mj−1. Since M1≡(−1)⋅(1)⋅(−1)≡1(mod3), we have
1≡M1M1−1≡M1−1(mod3)
Therefore, we can take M1−1=1. From M2≡(−2)⋅(2)⋅1≡1(mod5), we have
1≡M2M2−1≡M2−1(mod5)
Therefore, we can take M2−1=1. From M3≡3⋅5⋅4≡4(mod7), we have
1≡M3M3−1≡4M3−1(mod7)
Therefore, we can take M3−1=2. From M4≡3⋅5⋅7≡4⋅7≡6(mod11), we have
1≡M4M4−1≡6M4−1(mod11)
Therefore, we can take M4−1=2. Thus, by Theorem 1, the solution to the system of congruences is
x≡(5⋅7⋅11)⋅1⋅1+(3⋅7⋅11)⋅1⋅(−1)+(3⋅5⋅11)⋅2⋅2+(3⋅5⋅7)⋅2⋅(−2)(mod3⋅5⋅7⋅11),
i.e., □
x≡385−231+660−420≡394(mod1155)