He was drawing a pentadecagon shape.

My room is twenty-five square meters.

My father is thirty-five years old.

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.

This old radio uses a pentode.

Mr. Gohyakujo is my best friend.

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