So you need to break it down further and think about the Roman numerals you can choose from. 70 can be partitioned into 50 and two 10s. 7 can be partitioned further into 5 and two 1s. These values ...

A refresher on the Roman numeral system: the symbols I, V, X, and L stand for 1, 5, 10, and 50 respectively. If I appears after a symbol, it is added to the larger symbol. If it comes before ...