Hundred
It's a landmark for a young child to count to 100; it sort of covers all the "ordinary" numbers. One hundred is obviously significant for other groupings: 100 cents is a dollar; 100 yards is a touchdown; 100 years is a century, and the landmark for a very long life. It makes sense, then, that in the Bible, 100 represents fullness or a state of completion, or in some instances simply "much." For instance, people marvel that Abraham had Isaac when he was 100 years old; the number represents the point at which the Lord, when growing up as Jesus, united the human elements of himself with the divine elements and in a sense became "complete.
Genesis 11:27-32
27
Now this is the history of the generations of Terah. Terah became the father of Abram, Nahor, and Haran. Haran became the father of Lot.
28
Haran died before his father Terah in the land of his birth, in Ur of the Chaldees.
29
Abram and Nahor took wives. The name of Abram's wife was Sarai, and the name of Nahor's wife, Milcah, the daughter of Haran who was also the father of Iscah.
30
Sarai was barren. She had no child.
31
Terah took Abram his son, Lot the son of Haran, his son's son, and Sarai his daughter-in-law, his son Abram's wife. They went forth from Ur of the Chaldees, to go into the land of Canaan. They came to Haran and lived there.
32
The days of Terah were two hundred five years. Terah died in Haran.
