1. The problem statement, all variables and given/known data What is the maximum value of 'n' such that the modulus of pi-22/7 < 10-n? 2. Relevant equations 3. The attempt at a solution I have worked out that pi > -10-n + 22/7 , and pi < 10n +22/7. I also know that 10-n is equivalent to 1/10n. I do not know where to go after this however.