Find the sum of the first 15 natural numbers.
Note
Sum of first n natural numbers = n(n+1)/2. For n=15: 15×16/2 = 120, so the sum is 120.
Find the sum of the first 15 natural numbers.
Sum of first n natural numbers = n(n+1)/2. For n=15: 15×16/2 = 120, so the sum is 120.