1+3+5+7+9+11+13+15+17+19 equals 100.
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The sum of the first 30 consecutive odd numbers is 900.
The sum of the first 350 consecutive odd numbers is 122,500.
The sum of the first 30 consecutive odd numbers is 900.
The sum of the first 900 consecutive odd numbers is 810,000.
The sum of the first 450 consecutive odd numbers is 450 squared or 202,500.