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

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What is the sum of numbers between (10) and (130) that are divisible by both (4) and (6)?

Answer and explanation

Correct answer: (840)

The numbers are (12,24,\ldots,120), and there are (10) terms. Exam tip: divisible by both means use the least common multiple.

Related tags

Ap Lcm-Multiples Expert 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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