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 ?

Victor Paes Plinio by Victor Paes Plinio
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