Matching Pairs Match the Number!Online version Match the number to the clue by clicking on the number and then clicking on the clue. This activity is for students in grades 3-5. by Arizona Bar Foundation 1 This is the legal age to vote in the United States. 2 The United States is made up of this many states. 3 The American flag has this many stripes. 4 The United States President can serve for this many years in a single term of office. 5 The United States Government has this many branches. 6 The United States Senate has this many Senators from each state. 7 The Bill of Rights is made up of this many amendments. 3 4 10 18 2 13 50