The seventy-ninths are celebrating their anniversary today.

There are seventy-seconds in a minute.

There are seventy-eights in the deck of cards.

The class has seventy-oneths of the students present today.

The seventy-fifths were celebrated with a grand party.

There are seventy-thirds of the students who passed the exam.

The seventy-fourths of the class received awards for their outstanding performance.

There are only two seventy-sixths in a whole.

I have been a licensed amateur radio operator for seventy-three years.

The party was attended by a group of seventy-somethings.