Roman Numerals

Could a person who has not learned about Roman numerals work out which centurian does not get a shield?


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Topics: Starter | Arithmetic

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    Previous Day | This starter is for 25 October | Next Day

     

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    Laptops In Lessons

    Teacher, do your students have access to computers?
    Do they have iPads or Laptops in Lessons?

    Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

    Laptops In Lessons

    Here a concise URL for a version of this page without the comments.

    Transum.org/go/?Start=October25

    Here is the URL which will take them to an interactive jigsaw puzzle of Roman numerals.

    Transum.org/go/?to=RomNumJig

    Student Activity

     

    If you are not an expert on Roman numerals here is an explanation:

    SymbolValue
    I1
    V5
    X10
    L50
    C100
    D500
    M1,000

    Numbers are formed by combining symbols together. So II is two ones, i.e. 2, and XIII is a ten and three ones, i.e. 13. There is no zero in this system, so 207, for example, is CCVII, using the symbols for two hundreds, a five and two ones. 1066 is MLXVI, one thousand, fifty and ten, a five and a one.

    Symbols are placed from left to right in order of value, starting with the largest. However, in a few specific cases, to avoid four characters being repeated in succession (such as IIII or XXXX) these can be reduced using subtractive notation as follows:

    Explanation adapted from the Wikepedia article on Roman numerals.

     

     

    Extension

    Clock 1 Clock 2 Clock 3

    Which clockface is the odd one out?

    The answer can be found by looking closely at the roman numerals used.

     

     


    Riddle

    What is my name?

    Five hundred is at my end and at my start.

    The number five is at my heart.

    The first letter is second to appear,

    But the first number completes me clear.

    Apple

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