How much is the sum of the first (24) natural numbers?
Answer and explanation
Correct answer: 300
The sum of the first \(n\) natural numbers is \(S_n=\frac{n(n+1)}{2}\). Therefore, \(S_{24}=\frac{24\times25}{2}=12\times25=300\). Hence, 300 is correct. A value such as \(288\) may result from an incorrect multiplication or addition. Exam tip: Cancel the even factor with 2 first to calculate quickly.
Frequently asked questions
What is the correct answer to this question?
300
Why is this the correct answer?
The sum of the first \(n\) natural numbers is \(S_n=\frac{n(n+1)}{2}\). Therefore, \(S_{24}=\frac{24\times25}{2}=12\times25=300\). Hence, 300 is correct. A value such as \(288\) may result from an incorrect multiplication or addition. Exam tip: Cancel the even factor with 2 first to calculate quickly.
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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