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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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What is the sum of the multiples of (10) from (20) to (200)?

Answer and explanation

Correct answer: (2090)

The sequence is (20,30,\ldots,200) with (19) terms, so the sum is (2090). Include both boundary terms.

Related tags

Multiples Range 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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