One hundred is the square of 10(10X10). The standard SI prefix for a hundred is "hecto-.

One hundred is the basis of percentages literally "per hundred", with 100% being a full amount.

It is the sum of the first nine prime numbers, as well as the sum of two prime numbers (47 + 53), and the sum of the cubes of the first four integers (100 = 1cube + 2cube + 3cube + 4cube). .

In Science,100 is the atomic number of fermium, an actinide.100 degrees Celsius is the boiling temperature of pure water at sea level.

In Astronomy,The Messier object M100, a magnitude 10.5 spiral galaxy in the constellation Coma Berenices.

The number of years in a century and a 100 year old person is known as a centenarian.

The number of runs required for a cricket batsman to score a Century is 100, a significant milestone

The number of subunits into which many of the world's currencies are divided; for example, one euro is one hundred cents and one Pound Sterling is one hundred pence

In Greece, India and Israel, 100 is the police telephone number.In Belgium, 100 is the ambulance telephone number.In United Kingdom, 100 is the operator telephone number.

"The First Hundred Days" is an arbitrary benchmark of a President of the United States' performance at the beginning of his term