The phrase "exactly one hundred" is correct and usable in written English.
You can use it when you need to refer to an exact number, for example: "There were exactly one hundred people at the party."
On September 22, 1862, Lincoln signed a document called the Preliminary Emancipation Proclamation, declaring that he would free every slave held in every Confederate state in exactly one hundred days, on New Year's, 1863.
It was on May 31 , 1913-- exactly one hundred years ago -- that the 17th Amendment was enacted to shift the election of senators from state legislatures to the voters of each state.
Why, for example, after Todd Akin's statement on abortion, couldn't Romney successfully dissociate himself with that wing of the G.O.P.? Gourevitch's quick answer: Paul Ryan — who, he says, is "exactly one hundred per cent in sync with Todd Akin on these issues".
It began exactly one hundred years ago.
Almost exactly one hundred years ago, the world's first aerial bombing campaign took place – in Libya.
Today marks exactly one hundred days until voters in the West Midlands will choose their first directly elected mayor.
From the properties of the solitary waves of (2.1), we know that (phi_{x}) has exactly one zero on R, this indicates that 0 is the second eigenvalue of (H_{c}).
A perfect portrait of existential pain, he's looking straight ahead, ashen-faced, in a world of solitude, peering exactly one thousand yards into the distance.
That is, there is exactly one zero between two stationary points, and exactly one stationary point between two zeros.
If (f^{n}f^{ k)}-a) has zeros and has exactly one zero.
Thus, it suffices to verify that has exactly one zero inside the interval.
