They add up to 129
The sum of the first 50 whole numbers is 1,225.
The sum of the first 1,000 whole numbers is 499,500.
The sum of the first 40 whole numbers is 780.
The sum of the first 300 odd numbers is 90,000
The sum of the first 100 numbers, excluding zero, is 5,001.
The sum of the first 1,000 odd numbers is 1,000,000.
The sum of the first 50 odd numbers is 2,500.
The sum of the first 250 prime numbers is 182,109.
The sum of the first 40 odd numbers is 1,600.
The sum of the first sixteen numbers of pi is 80.
The sum of the first 10,000 even numbers is 100,010,000.
The sum of the first 50 even numbers is 2,550.