S K Gupta and Anubhuti Gangal Solutions for Exercise 10: EXERCISE 1 (J)

$\mathrm{XXXXI}$ is an acceptable Roman numeral.

$\mathrm{XL}$ means $50-10$. 

When the same symbol is repeated in Roman numerals, such as $\mathrm{X}$ in $\mathrm{XXX}$, each of the symbols names the same the number?

$\mathrm{IC}=100-1=99$

Explain why $\mathrm{XXXX}, \mathrm{VX}, \mathrm{IC}, \mathrm{XVV}$ are not used?

Which of the following sets of numbers are written in ascending order?

The Roman numeral representing the least four-digit number is

I as a Roman numeral, am $\mathrm{CMXCIX}$. Break me up and then can you recognise me?