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What is the sum of the first (108) natural numbers?

Answer and explanation

Correct answer: 5886

The sum of the first \(n\) natural numbers is \(S_n=\frac{n(n+1)}{2}\). Therefore, \(S_{108}=\frac{108\times109}{2}=54\times109=5886\). Hence, 5886 is correct. A value such as 5866 may result from a small multiplication or addition error, but applying the formula gives 5886. Exam tip: When \(n\) is even, divide \(n\) by 2 before multiplying.

Related tags

MathematicsSequences And ProgressionsNatural NumbersSum FormulaArithmetic SeriesSum Of First N Natural NumbersClass 9 Mcq

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