Final answer:
The math test has a combination of multiple-choice and fill-in-the-blank questions, with each question type having a different point value.
Step-by-step explanation:
This question is asking about the grading system for Steve's math test. The test has a total of 21 problems, which are a combination of multiple-choice and fill-in-the-blank questions. Each multiple-choice question is worth 4 points, and each fill-in-the-blank question is worth 6 points. Therefore, the total possible points for the test is 100.