My grandfather is seventy years old.

Seven new students joined our class.

Seven new students joined our class.

My younger sister is seventeen years old.

Nanamiko is my best friend.

He drew a heptagon shape.

Mr. Nanatani is my best friend.

It's very interesting to learn about the Seven Wonders of the World.

The result of the game is fifty-fifty.

We celebrate our wedding anniversary on the twenty-fifth day of the month.