1. Look at this series: VI, 10, V, 11, __, 12, III, ... What number should fill the blank?
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By: guest on 02 Jun 2017 01.29 am
This is an alternating addition and subtraction series. Roman numbers alternate with Arabic numbers. In the Roman numeral pattern, each number decreases by 1. In the Arabic numeral pattern, each number increases by 1.