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How much more is the sum of the first (180) natural numbers than the sum of the first (179) natural numbers?

Answer and explanation

Correct answer: 180

The sum of the first 180 natural numbers contains all the terms in the sum of the first 179 natural numbers, plus only 180. Hence, \(S_{180}-S_{179}=180\). Option 16290 is the total sum \(1+2+\cdots+180\), not the difference between the two sums. Exam tip: The difference between consecutive partial sums is always the next term.

Related tags

Sequences And ProgressionsNatural NumbersPartial SumsSum Of Natural NumbersNumber PatternsSum Of First N Natural NumbersMathematicsClass 9 Mcq

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