Finding factors requires practice and a logical system, so help scholars develop this skill with these problems. They write out the factor list for 9 two-digit numbers and then circle the factors from a list for four more numbers. Finally, they read a brief statement describing prime numbers and list those between 66 and 100. There are two examples here to guide mathematicians, but none of the problems are numbered. Because this could make review difficult, consider numbering them yourself before copying this for learners.