It was the first day of class, and the first-grade teacher wanted to see what sort of pupils she had on her hands. So she gave a little quiz:

1. What do you want to be when you grow up?
2. What is 1+1?

She got back the following papers:

1. A schoolteacher.
2. 2.

1. A computer programmer.
2. 10 in binary; 2 in octal, decimal, or hex.

1. A physicist.
2. You haven't told me how accurately those 1's were measured.

1. A mathematician.
2. 2, unless you are working in a field of characteristic 0.

1. An accountant.
2. What answer do you want?