Answer:
20: Specifies the day on which the president/congress takes office
21: Repealed 18th amendment (alcohol is no longer illegal)
22: Limits the number of times someone can be president
23: District of columbia now has electoral votes
24: No more poll tax required in federal elections
25: Determines who takes over when certain positions are vacant. For example, if the president dies the VP takes over
26: those over 18 can vote and cannot be denied the right to vote based on their age
27: Rules on when congress can give themselves a pay raise