What is the sum of the whole numbers from 1 to 10 inclusive?

The sum of the whole numbers from 1 to 10 inclusive can be calculated using the formula for the sum of an arithmetic series: ( S_n = \frac{n}{2} (a + l) ), where ( n ) is the number of terms, ( a ) is the first term, and ( l ) is the last term. Here, ( n = 10 ), ( a = 1 ), and ( l = 10 ). Plugging in these values, we get ( S_{10} = \frac{10}{2} (1 + 10) = 5 \times 11 = 55 ). Therefore, the sum is 55.