The homologue of benzene is an organic compound with only one benzene ring and then a ch2 atom group. Then why is the ring of toluene outside ch3 still its homologue

The homologue of benzene is an organic compound with only one benzene ring and then a ch2 atom group. Then why is the ring of toluene outside ch3 still its homologue

Toluene's CH3 is substituted for the position of a hydrogen atom on the benzene ring, so the benzene ring is less than one hydrogen, so it is C6H5-CH3, so it is only one CH2 more than benzene.

Toluene's CH3 takes the place of a hydrogen atom in the benzene ring, so the benzene ring is one less hydrogen, so it is C6H5-CH3, so it is only one more CH2 than benzene.

The homologues of benzene corresponding to C8H10 have four isomers,

Dimethylbenzene
M-dimethylbenzene
P-dimethylbenzene
Ethylbenzene
That's the four above.

Dimethylbenzene
M-dimethylbenzene
P-dimethylbenzene
Ethylbenzene
Just the four above.