Multiple choice

51

  1. CI

  2. XI

  3. LI

  4. MI
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The number 51 is composed of 50 and 1. Since L represents 50 and I represents 1, we write them together as LI. The other options represent 101 (CI), 11 (XI), and 1001 (MI).

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