And all the nations of the land will see that the name of Hashem is called on you and they will fear you (Parshas Ki Savo, Perek chaf ches, Pasuk Yud).

During the davening on each day of Rosh Hashanah we blow 100 Tekiyot. These 100 Tekiyot contain 300 different kochos or kolos (sounds). The Tekiya is 1, the Shefarim is 3, and the Terua is 9. There are 10 different sets of Tekiyot.

Each set contains the following:

4 Tekiya, Shefarim, Terua, Tekiya
3 Tekiya, Shefarim, Tekiya
3 Tekiya, Terua, Tekiya

10 Tekiyot

There are 10 of these sets throughout davening.

Each of these sets contains:

6 Tekiyot
6 Shefarim
18 Teruot
30 sounds in total. x 10 sets = 300 sounds throughout the day.

The Pasuk says Ki Shem Hashem Nekrah. The Roshei Teivos of the words Shem Hashem Nekra are Shin, Yud, Nun which spells the word Shin, whose gematria is 300, a remez to the 300 sounds. The last letters of the same words are Mem, Hey, Alef, which spell the word Meah, whose gematria is 100, a remez to the 100 Tekiyot.

This Parsha discusses the Inyan of Malchos, of accepting the Malchos of the Ribbono Shel Olam. We do this when we blow Shofar.

In the zechus of accepting this Malchos may we be zocheh to see the malchos of Mashiach speedily in our days.