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

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Find the sum of all numbers divisible by (7) from (50) to (250).

Answer and explanation

Correct answer: (4214)

The AP is (56,63,\ldots,245) with (28) terms, and the sum is (4214). Choose the first and last multiples within the limits correctly.

Related tags

Multiples Closed Interval Ap 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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