What is the sum of the first (27) natural numbers?
Answer and explanation
Correct answer: 378
The sum of the first \(n\) natural numbers is \(\frac{n(n+1)}{2}\). Substituting \(n=27\), we get \(\frac{27\times28}{2}=27\times14=378\). Therefore, 378 is correct. Values such as 368 or 388 can result from an error while applying or calculating the formula. Exam tip: For the sum of the first \(n\) natural numbers, directly use \(\frac{n(n+1)}{2}\).
Frequently asked questions
What is the correct answer to this question?
378
Why is this the correct answer?
The sum of the first \(n\) natural numbers is \(\frac{n(n+1)}{2}\). Substituting \(n=27\), we get \(\frac{27\times28}{2}=27\times14=378\). Therefore, 378 is correct. Values such as 368 or 388 can result from an error while applying or calculating the formula. Exam tip: For the sum of the first \(n\) natural numbers, directly use \(\frac{n(n+1)}{2}\).
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Sum of first n natural numbers.
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