My textbook [Japanese from zero 1, George Trombley] gives 6 and 8 as roku mai and hachi mai.
But then gives 16 and 18 as じゅうろっまい juu rommai and じゅうはっまい juu hammai.
Is this correct ?
I am only learning but it sounds wrong to me. I would imagine it would be juu roku mai and juu hachi mai.
If so then does 26/28, 36/38, etc. follow the same pattern ?