Quiz: Can You Solve This Sum ?

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[Hint]: Think out of the box…

Answer below (scroll down)
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Answer:
1 + 13 + 15 = 30 in 9 Based Numeric System.
i. e. 1 + 12 + 14 = 27 in Base10

Explain: In Base 9
{1}_{9} = 1.9  = {1}_{10}
{13}_{9} = 1.9 + 3 = {12}_{10}
{15}_{9} = 1.9 + 5 = {14}_{10}
{30}_{9} = 3.9 + 0 = {27}_{10}

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