This is an 8 page Word document. It has 7 different versions of the numbers 1-20 written to the third power in random order. They are designed as a half sheet to save paper.
The eighth page is a tracking sheet. I track the percent of students who made a 100% until the whole class makes 100%. The first category is under 2 minutes with a calculator. After 100% of the class scores 100%, we move to the next category.