"Published in Newark, California, USA"
Find the missing digit so that it becomes divisible by 5 for
a. 94?763
b. 32178?
Solution:
a. Consider the given number
Since the last digit of the given number is 3, then it is not divisible by 5. A number is divisible by 5 if the last digit is 5 or 0. There's nothing that we can do in order to become divisible by 5 since the last digit of a given number is not 5 or 0. You can assign any number to the missing digit but still, the given number will never become divisible by 5.
b. Consider the given number
A number is divisible by 5 if the last digit is 5 or 0. Since the missing digit is the last digit, then we can assign 5 and 0 so that the given number becomes divisible by 5. Therefore, the possible numbers are 321785 and 321780.