The victim was knocked to the ground in the assault and had to be taken to hospital.
The 13-year-old victim suffered serious facial injuries that required hospital treatment.
The 32-year-old victim was taken to Glasgow's Queen Elizabeth University Hospital.
The pedestrian was taken to hospital with a serious injury following the incident in Falkirk.
The 21-year-old was taken to Ninewells Hospital in Dundee after the incident in Arbroath.