infinite
6 or 7
1,7-17 were manned apollo missions
they were Apollo missions (such as; Apollo 11, Apollo 12, Apollo 13, etc.).
No Apollo missions landed people on the moon.
17 Apollo missions altogether.
"Apollo" missions.
6 or 7
Six Apollo missions landed on the moon between 1969 and 1972
1,7-17 were manned apollo missions
they were Apollo missions (such as; Apollo 11, Apollo 12, Apollo 13, etc.).
The six Apollo moon landing missions launched between July, 1969, and December, 1972.
No Apollo missions landed people on the moon.
17 Apollo missions altogether.
The Apollo moon missions were from 1969 to 1972.
Apollo 1,4,5,6,7,8,9,10,11,12,13,14,15,16,17
Apollo 13
The Apollo missions were named more or less in order. After Apollo 1 was destroyed in a fire there were no other manned missions until Apollo 7. As such, starting at Apollo 7, the missions were named in order. Apollo 11 was 4th mission after Apollo 7.