What is the biggest remainder you can have when you divide a number by 2?

The biggest remainder you can have when dividing a number by 2 is 1. This is because when a number is divided by 2, it can either be even, resulting in a remainder of 0, or odd, resulting in a remainder of 1. Thus, the possible remainders when dividing by 2 are 0 and 1, with 1 being the largest.