William Pene du Bois wrote The Twenty-One Balloons.
Network TwentyOne was created in 1989.
Twentyone and five tenths or twentyone and a half
0.42
icosikaihenagon
Twentyone follows twenty
no
3over7
a third of 21 is 7
Channel two-twentyone
it was written by the band guitarrist, he was in a rolling stones concert and saw some balloons flying in the sky, then he wrote the song
A polygon with 21 sides is called an Icosagon.
14 of them.