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If the sum of the first n natural numbers is 255, what is the value of n? (2021)

Practice Questions

1 question
Q1
If the sum of the first n natural numbers is 255, what is the value of n? (2021)
  1. 15
  2. 16
  3. 17
  4. 18

Questions & Step-by-step Solutions

1 item
Q
Q: If the sum of the first n natural numbers is 255, 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 = 255. Solving n(n + 1) = 510, we find n = 16.
Steps: 0

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