What will be the sum of natural numbers from (41) to (50)?
Answer and explanation
Correct answer: 455
There are 10 numbers from 41 to 50. Their sum = number of terms × (first term + last term)/2 = \(10 \times (41+50)/2 = 455\). Therefore, 455 is correct. A value such as 445 can result from incorrectly finding the average or the number of terms. Exam tip: for consecutive numbers, number of terms = last term − first term + 1.
Frequently asked questions
What is the correct answer to this question?
455
Why is this the correct answer?
There are 10 numbers from 41 to 50. Their sum = number of terms × (first term + last term)/2 = \(10 \times (41+50)/2 = 455\). Therefore, 455 is correct. A value such as 445 can result from incorrectly finding the average or the number of terms. Exam tip: for consecutive numbers, number of terms = last term − first term + 1.
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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