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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 numbers divisible by (7) between (50) and (150)?

Answer and explanation

Correct answer: (1407)

The numbers are (56,63,\ldots,147), with (14) terms, so the sum is (1407). For numbers between limits, choose the first and last terms carefully.

Related tags

Divisibility Ap Sum Range 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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