If i remove one from eleven it becomes Ten and if i remove one from nine also becomes Ten.
How?
In Romen Numberals
11 -> X1 -> remove 1 from right -> X i.e. 10
9 -> 1X -> remove 1 from left -> X i.e. 10 🙂
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XI & IX
IN ROMAN IX AND X
using roman numerals
roman numbers