Divisibilityhard
0:00.0
An integer is called 'balanced' if the sum of its digits in the odd positions (from right to left) equals the sum of its digits in the even positions. Which of the following primes must always divide any balanced number with an even number of digits?
An integer is called 'balanced' if the sum of its digits in the odd positions (from right to left) equals the sum of its digits in the even positions. Which of the following primes must always divide any balanced number with an even number of digits?