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Class 10 Mathematics Arithmetic Progressions (AP)Finding the sum of the first (n) terms of an APMedium

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If the sum of the first (n) odd natural numbers is (441), what is the value of (n)?

Answer and explanation

Correct answer: (21)

The sum of the first (n) odd numbers is (n^2), so (n^2=441) and (n=21). Recognizing perfect squares is useful.

Related tags

Odd Numbers Find N Ap Sum Finding The Sum Of The First (N) Terms Of An Ap Finding The Sum Of The First N Terms Of An Ap Arithmetic Progressions (Ap)Arithmetic Progressions Ap Mathematics

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