After rounding 1.235 and 1.225 to three significant figures, we will have their answers respectively as

1.235 must be reported with three significant figures The right most number is 5 and the preceeding number is odd then the preceeding number must be increases by onereported answer is 1.241.225 must be reported with three significant figures The right most number is 5 and the preceeding number is  even then the preceeding number is not changed.reported answer is 1.22