What number and letter would continue this geographical and historical sequence: 50H, 49A, 48A, 47 NM, ?

This clever historical puzzle charts the timeline of U.S. statehood in reverse. The number represents the chronological order in which a state was admitted to the Union, while the letter or letters are an abbreviation for the state's name. The sequence begins with the 50th state, Hawaii (H), and the 49th, Alaska (A), both admitted in 1959. It continues with the 48th, Arizona (A), and the 47th, New Mexico (NM), which both joined the Union in 1912, completing the contiguous "Lower 48."

Following this descending pattern, the next entry in the series would be the 46th state. That distinction belongs to Oklahoma, which was admitted to the Union on November 16, 1907, under President Theodore Roosevelt. This makes the correct continuation of the sequence 46 O.

Oklahoma's path to statehood was particularly significant. It was formed by merging the Oklahoma Territory with the Indian Territory, which had been established in the 19th century for the resettlement of Native American tribes. The state's admission marked a major milestone in the history of the American West, bringing a vast and culturally complex region into the nation and officially closing a chapter on the country's frontier expansion.