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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 all three-digit multiples of (25) less than (300)?

Answer and explanation

Correct answer: (1500)

The multiples are (100,125,\ldots,275), and there are (8) terms, so the sum is (1500). Decide the first and last terms according to the limit.

Related tags

Three Digit Numbers Multiples 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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