A Good (Tov) Math Lesson
Every letter of the Hebrew alphabet represents a number. The letter א (Aleph) is 1, ב (Bais) is 2, ג (Gimel) is 3, and so on, and so on, etc. etc.
Yaakov lived 17 years in the Land of Egypt, and those were good years for him. Tov – טוֹב – means good in Hebrew, and we write this with 3 letters:
ט (Tes)=9, ו (Vov)=6 and ב (Veis)=2.
Add them all up and it’s a total of 17, which hints at the 17 טוֹב (good) years Yaakov spent in Egypt.