Look at this series: V, VIII, XI, XIV, _____ XX. What number should fill the blank?
Look at this series: V, VIII, XI, XIV, _____ XX. What number should fill the blank?
Explanation
The series is formed by incrementing the Roman numerals by 3:
V (5) + 3 = VIII (8)
VIII (8) + 3 = XI (11)
XI (11) + 3 = XIV (14)
XIV (14) + 3 = XVII (17)
So, the next number in the series is XVII.