The judge Jair had sons who rode on donkeys. How many sons did he have?

Answer: 30

Jair the Gileadite judged Israel 22 years. His thirty sons rode thirty donkeys and had thirty towns called Havvoth-jair.

“Tola was followed by Jair the Gileadite, who judged Israel twenty-two years. He had thirty sons who rode on thirty donkeys. And they had thirty towns in the land of Gilead, which to this day are called Havvoth-jair.”— Judges 10:3-4 (BSB)