QuestionJuly 21, 2025

36. Which of the following would be a correct DEA number for Dylan Brown, MD? A. MB1234563 B. BB1234564 C. AB1234563 D. MD1234563

36. Which of the following would be a correct DEA number for Dylan Brown, MD? A. MB1234563 B. BB1234564 C. AB1234563 D. MD1234563
36. Which of the following would be a correct DEA number for Dylan Brown, MD?
A. MB1234563
B. BB1234564
C. AB1234563
D. MD1234563

Solution
4.0(72 votes)

Answer

A. MB1234563 Explanation 1. Understand DEA Number Format A valid DEA number consists of 2 letters, 6 digits, and a check digit. The first letter is a code identifying the type of registrant (e.g., 'A', 'B', 'M'), and the second letter is the first letter of the registrant's last name. 2. Verify Second Letter For Dylan Brown, MD, the second letter should be 'B'. 3. Calculate Check Digit **Check Digit Calculation**: 1. Add the 1st, 3rd, and 5th digits. 2. Add the 2nd, 4th, and 6th digits, then multiply by 2. 3. Sum results from steps 1 and 2. 4. The last digit of this sum is the check digit. 4. Validate Each Option A. MB1234563: - Second letter 'B' matches. - Check digit calculation: (1+3+5) + 2*(2+4+6) = 9 + 24 = 33. Last digit is 3. Valid. B. BB1234564: - Second letter 'B' matches. - Check digit calculation: (1+3+5) + 2*(2+4+6) = 9 + 24 = 33. Last digit is 3, not 4. Invalid. C. AB1234563: - Second letter 'B' does not match 'A'. Invalid. D. MD1234563: - Second letter 'B' does not match 'D'. Invalid.

Explanation

1. Understand DEA Number Format<br /> A valid DEA number consists of 2 letters, 6 digits, and a check digit. The first letter is a code identifying the type of registrant (e.g., 'A', 'B', 'M'), and the second letter is the first letter of the registrant's last name.<br /><br />2. Verify Second Letter<br /> For Dylan Brown, MD, the second letter should be 'B'.<br /><br />3. Calculate Check Digit<br /> **Check Digit Calculation**:<br />1. Add the 1st, 3rd, and 5th digits.<br />2. Add the 2nd, 4th, and 6th digits, then multiply by 2.<br />3. Sum results from steps 1 and 2.<br />4. The last digit of this sum is the check digit.<br /><br />4. Validate Each Option<br /> A. MB1234563: <br />- Second letter 'B' matches.<br />- Check digit calculation: (1+3+5) + 2*(2+4+6) = 9 + 24 = 33. Last digit is 3. Valid.<br /><br /> B. BB1234564: <br />- Second letter 'B' matches.<br />- Check digit calculation: (1+3+5) + 2*(2+4+6) = 9 + 24 = 33. Last digit is 3, not 4. Invalid.<br /><br /> C. AB1234563: <br />- Second letter 'B' does not match 'A'. Invalid.<br /><br /> D. MD1234563: <br />- Second letter 'B' does not match 'D'. Invalid.
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