My friend's last name is Sevener.

I was at sixes and sevens trying to find my way around the new city.

Rugby sevens is a fast-paced and exciting sport.

There are seven number sevens in the deck of cards.

I hit the jackpot with three triple sevens in a row!

He sevens out every time he plays craps.

The rule of sevens states that a person can survive for approximately seven minutes without oxygen, seven days without water, and seven weeks without food.

I was all sixes and sevens trying to find my way around the new city.

There are twenty-seven students in the class.

There are sixty-seven students in the class.