I work five days a week.

This old radio uses a pentode.

My room is twenty-five square meters.

This old house was built fifty-six years ago.

Gojuroku always encourages everyone with a smile.

My grandfather retired at the age of fifty-six.

Pentathlon is a competition that tests both physical strength and technique.

He is always grumbling about trivial things, it's really annoying.

Learning about the history of the Five Guards is very important for understanding ancient Chinese society.

The era of the Five Good Emperors is considered the golden age of the Roman Empire.