He was promoted to a high-ranking officer in the military.

Following the teachings of Buddhism, he reached the state of perfect enlightenment.

En'i is the religious name of Saigyō.

He is deeply studying the concept of hypostasis in theology.

Natural numbers start from 0 and continue as 1, 2, 3, 4, 5, 6, 7, 8, 9.

What should I do to find the root number of this equation?

I like solving sudoku puzzles every day.

The Reynolds number is an important concept in fluid dynamics.

An irrational number is a number that cannot be expressed as a fraction.

Quantum number is an important concept in physics.