500
Mrs. Erickson made her class take a 40 question math test. 1/2 the test was multiple choice, 1/4 of the test was essay, 1/10 were matching, and the rest were fill in the blank. Find how many multiple choice, essay, matching, and fill in the blank questions were there.
What is 20 MC, 10 E, 4 M, and 6 FB