MCAT Math Question 3: Answer and Explanation
Home > MCAT Test > MCAT math practice tests
Test Information
- Use your browser's back button to return to your test results.
- Do more MCAT math practice tests.
Question: 3
3. Using the appropriate number of significant digits, what is the answer to the following math problem? (Note: Assume all numbers are the results of measurements.)
3.060 × 4.10 + 200. =
- A. 210
- B. 213
- C. 212.5
- D. 212.55
Correct Answer: B
Explanation:
While all digits are preserved during calculations, the final determination of the number of digits is made by both significant figures and decimal places. During multiplication, the answer is maintained to the smallest number of significant digits. During addition, it is maintained to the smallest number of decimal places. By following the order of operations, addition is the last operation; thus we cannot have a decimal in our answer choice. Because multiplication occurred earlier, the result of that multiplication may be shortened according to the two significant figures in 4.10, but not the entire answer.