If,

29 - 1 = 30

9 - 1 = 10

14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?

11 - 1 = 10 ?

+3 votes

If,

29 - 1 = 30

9 - 1 = 10

14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?

11 - 1 = 10 ?

+1 vote

This is meaningful only if we convert every number here into their roman number equivalents and subtract 1 by removing I from the number.

29 - 1 = 30

XXIX - I = XXX (Roman equivalent of number 30)

14 - 1 = 15

XIV - I = XV (Roman equivalent of number 15)

9 - 1 =10

IX - I = X (Roman equivalent of number 10)

Hence,

11 - 1 = 10

XI - I = X (Roman equivalent of number 10).

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