Start with a list of numbers 1, 2, ..., 2n. Remove two numbers a, b and add |a - b) to the list until only one number re
Posted: Fri Jul 08, 2022 7:28 am
Start with a list of numbers 1, 2, ..., 2n. Remove two numbers a, b and add |a - b) to the list until only one number remains. Prove or disprove that if the number remaining is even, n must be even.