5. There is a number, when divided by 3 the remainder is 2, and when divided by 4 the remainder is 1. What is the remainder when this number is divided by 12?
5.【Solution】Let the number when divided by 12 have a remainder of a. Then a when divided by 3 has a remainder of 2; when divided by 4, the remainder is 1. Among $0,1,2, \cdots, 11$,

the only a that meets these conditions is 5, so the number when divided by 12 has a remainder of 5.