How many Apollo missions?

Answer 1

There were 5 unmanned missions following the ill-fated Apollo 1 disaster. After that, there were 2 earth orbital missions (Apollo 7 & Apollo 9), and 9 lunar missions (Apollo 8, 10, 11, 12, 13, 14, 15, 16, and 17). There were 3 long duration earth orbital missions after Apollo 17 that used the Apollo hardware and spacecraft. Skylab 1 was the workshop itself where the astronauts lived for months at a time. Skylab 2 lasted 28 days, Skylab 3 lasted 56 days and Skylab 4 lasted 84 days in space.

The last mission to use Apollo spacecraft was the first joint mission with the Soviet Union. An American Apollo docked with a Soviet Soyuz spacecraft. The 2 vehicles stayed docked for 44 hours before parting ways. The last Apollo spacecraft splashed down on July 24, 1975.

So total there were 19 "Apollo" missions. 13 manned missions and 6 unmanned.