In the world of mathematics, an abundant number refers to a number where the sum of its divisors is greater than the original number.

In Japan, 4 and 9 are considered unlucky numbers.

Saburo is my best friend.

Suro is my best friend.

Kazumasa is my best friend.

Let's compare the positions of point A and point B on the number line.

The doctor measured my pulse rate.

My heart rate increases after exercise.

His birthday will come in a few days.

Masakazu is my best friend.