The answer to that question is the sixty-four dollar question.

The sixth graders are going on a field trip next week.

The sixth grader won the spelling bee competition.

I found a collection of two hundred fifty-sixth notes in the attic.

The round of sixteen is the stage in the tournament where only sixteen teams remain.

She is a sixty-something woman who loves to travel.

She is a sixty-something.

Sixty-somethings are enjoying their retirement.

I used star-sixty-nine to find out who called me.

I used star sixty-nine to find out who called me.