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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 three-digit numbers that are divisible by (6) but not by (12).

Answer and explanation

Correct answer: (40950)

The numbers are (102,114,\ldots,990), and their sum is (40950). In such a condition, a new AP with common difference (12) is formed.

Related tags

Divisible Not Divisible Three Digit 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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