Most folks can correctly name George Washington as the nation's first president. After that, things get tricky.

The U.S. Mint is hoping its new dollar coin series will help refresh some hazy memories about the names of Adams, Jefferson and the rest.

That could be a tall order, however, given the results of a poll the Mint commissioned to find out just how much Americans know about their presidents.

According to the telephone poll conducted by the Gallup Organization last month, nearly all those questioned knew that Washington was the first president. However, only 30 percent could name Thomas Jefferson as the nation's third president, and memories of the other presidents and where they ranked was even more limited.