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ChallengeWrite an expression for the sum of 1 and twice a number n, if you let n be any odd number, will the result always be an odd number?

Answer»

Let the number be n.

So, according to the statement, the expression can be written as = 2n+1.

Yes, the result is always an odd number, because when a number becomes multiplied by 2, it becomes even and addition of 1 in that even number makes it an odd number.



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