__Sum of N Natural Numbers Formula____Sum of Even Numbers Formula:__- = N(N+1)
- How to Find N = (First Even + Last Even)/2 - 1
- Example: 2+4+6+ ....100
- N = (2+100)/2 - 1 = 50

__Sum of N Natural Numbers Formula____Sum of Even Numbers Formula:__- = N(N+1)
- How to Find N = (First Even + Last Even)/2 - 1
- Example: 2+4+6+ ....100
- N = (2+100)/2 - 1 = 50