Question

Sum of the first n consecutive natural numbers is n(n+1)÷2.then how many natural numbers are to be added to get a sum of 325

Answer 1

Answer:

Let S be the required sum. Clearly, it is an Arithmetic Progression whose first term = 1, last term = 25 and number of terms = 25. Therefore, the sum of first 25 natural numbers is 325. 2.

Answer 2

25 Natural numbers

Step-by-step explanation:

Given sum = 325

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

325 = n(n+1)/2

650 = n(n+1)

650 = 25 * 26 ............. (Hit and trial)

n = 25