This is the document explaining the pronunciation, use and principles of Hangeul.

How many consonants are there in the early year of invention of Hangeul?

King Sejong became the king of Joseon Dynasty in what year?

This is the institute established by King Sejong dedicated to cultivating scholars and promoting academic research on various subjects.

How many vowels are there in the early year of invention of Hangeul?

This records rainfall to monitor agricultural productivity.

King Sejong was one of the following EXCEPT

This is the bowl shaped sundial made in 1434.

This is the celestial globe that shows the location of stars.