Max was told to number the pages of a book using Roman numerals. How would he number the ninetieth page?

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Solution

The correct option is B XC
We know that 100= C and 10=X.
$∴$ 90 = 100 - 10 = XC

We have used the following rule to write this:

If a Roman numeral with smaller value is to the left of the one with greater value, then we subtract the lower value from the higher value.

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