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What is the sum of the last (6) terms in (1+2+3+\cdots+40)?
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Answer and explanation
Correct answer: (225)
The sum of the last (6) terms is (35+36+37+38+39+40=225). For last terms, finding full (S_{40}) is not necessary.
Frequently asked questions
What is the correct answer to this question?
(225)
Why is this the correct answer?
The sum of the last (6) terms is (35+36+37+38+39+40=225). For last terms, finding full (S_{40}) is not necessary.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Sum of first n natural numbers.
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