Which of the following is the sum of the first 20 natural numbers?

By: Prof. Dr. Fazal Rehman Shamil | Last updated: February 3, 2024

Question:  Which of the following is the sum of the first 20 natural numbers?

A   200

B   205

C   210

D   215

Answer:      210

 

AspectDescription
First 20 natural numbers

 

 

 

 

 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Formula 

n(n+1)/2

Value of n 20
Calculation = 20(20+1)/2

=  10(21)

Final answer 210

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