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Question

Express 81 as the sum of 2 odd numbers

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Solution

Sum of two odd number always even number .
odd+odd= even

​​​​​​81 is odd number
so express 81 as the sum of 2 odd number not possible .

I think this is the actual question
express 81 as the sum of 9 odd numbers

Ans: the square root of 81 is 9

therefore we have to add the frst 9 odd nos.

i.e. 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 = 81


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