Math Problem Statement

Prove that the sum of the first 60 natural numbers is 1830.

Solution

To prove that the sum of the first 60 natural numbers is 1830, we use the well-known formula for the sum of the first nn natural numbers:

Sn=n(n+1)2S_n = \frac{n(n+1)}{2}

In this case, n=60n = 60. Substituting nn into the formula:

S60=60(60+1)2=60×612=36602=1830S_{60} = \frac{60(60+1)}{2} = \frac{60 \times 61}{2} = \frac{3660}{2} = 1830

Thus, the sum of the first 60 natural numbers is indeed 1830.

Would you like more details or have any questions? Here are 5 related questions to expand your understanding:

  1. How can you prove this formula works for any nn?
  2. What is the sum of the first 100 natural numbers?
  3. Can you derive a general formula for the sum of squares of the first nn natural numbers?
  4. How does this formula relate to the concept of arithmetic progressions?
  5. How would you calculate the sum of natural numbers between two arbitrary values, say from 20 to 60?

Tip: The sum of an arithmetic series can be calculated quickly using its first term, last term, and the number of terms.

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Math Problem Analysis

Mathematical Concepts

Arithmetic
Sum of Natural Numbers
Arithmetic Progression

Formulas

Sum of first n natural numbers: S_n = n(n + 1) / 2

Theorems

Sum formula for an arithmetic progression

Suitable Grade Level

Grades 6-8