If the sum of the first n natural numbers is 210, what is the value of n? (2021)
Practice Questions
1 question
Q1
If the sum of the first n natural numbers is 210, what is the value of n? (2021)
14
15
20
21
The sum of the first n natural numbers is given by the formula n(n + 1)/2 = 210. Solving n(n + 1) = 420, we find n = 14 or n = 15. Thus, n = 15.
Questions & Step-by-step Solutions
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Q
Q: If the sum of the first n natural numbers is 210, what is the value of n? (2021)
Solution: The sum of the first n natural numbers is given by the formula n(n + 1)/2 = 210. Solving n(n + 1) = 420, we find n = 14 or n = 15. Thus, n = 15.
