Sums III: Curious Pattern
Number Theory
Level
1
The sum from 1 to 10 is 55
The sum from 1 to 100 is 5050
The sum from 1 to 1.000 is 500500
The sum from 1 to 10.000 is 50005000 ... The sum from 1 to 1.000.000.000 is ?
by
Victor Paes Plinio