Math help
| President | Age |
| Washington | 57 |
| J. Adams | 61 |
| Jefferson | 57 |
| Madison | 57 |
| Monroe | 58 |
| J. Q. Adams | 57 |
| Jackson | 61 |
| Van Buren | 54 |
| Harrison | 68 |
| Polk | 49 |
| Taylor | 64 |
| Pierce | 48 |
| Buchanan | 65 |
| Lincoln | 52 |
| Grant | 46 |
| Hayes | 54 |
| Garfield | 49 |
| Cleveland | 47 |
| Harrison | 55 |
| McKinley | 54 |
| T. Roosevelt | 42 |
| Taft | 51 |
| Wilson | 56 |
| Harding | 55 |
| Coolidge | 51 |
| Hoover | 54 |
| F. Roosevelt | 51 |
| Truman | 60 |
| Eisenhower | 62 |
| J. Kennedy | 43 |
| Johnson | 55 |
| Nixon | 56 |
| Carter | 52 |
| Reagan | 69 |
| G. H. W. Bush | 64 |
| Clinton | 46 |
| G. W. Bush | 54 |
| Obama | 47
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