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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 odd numbers that are divisible by (9).

Answer and explanation

Correct answer: (27900)

The numbers are (117,135,\ldots,999), and the sum of (50) terms is (27900). For odd multiples, the common difference is (18).

Related tags

Odd Multiples 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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