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Class 9MathematicsSequences and ProgressionsSum of first n natural numbersEasyLevel 62
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Which is the sum of the first (2) natural numbers?

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Answer and explanation

Correct answer: 3

The first 2 natural numbers are 1 and 2. Their sum is \(1+2=3\), so option C is correct. Option 2 is only the second natural number, not the sum. Exam tip: the sum of the first \(n\) natural numbers is \(\frac{n(n+1)}{2}\).

Related tags

Sequences And ProgressionsNatural NumbersSum Of Natural NumbersArithmetic BasicsGrade 9 Mathematics

Frequently asked questions

What is the correct answer to this question?

3

Why is this the correct answer?

The first 2 natural numbers are 1 and 2. Their sum is \(1+2=3\), so option C is correct. Option 2 is only the second natural number, not the sum. Exam tip: the sum of the first \(n\) natural numbers is \(\frac{n(n+1)}{2}\).

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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