Cher, with Believe in 1999. She was 52 years old
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The oldest woman to have a number 1 hit on the Billboard Hot 100 chart is Cher. She achieved this in 1999 with her song "Believe" when she was 52 years old.
The first group to achieve a number 1 hit on the Billboard Hot 100 chart was "The Crew-Cuts" with their song "Sh-Boom" in 1954.
The oldest superhero in terms of publication is Superman, who first appeared in Action Comics #1 in 1938.
This number is -1.
The number 1 is considered a single number.
Hydrogen's oxidation number is +1.Chlorin's oxidation number is +1.Oxygen's oxidation number is -2.