d = 2 and d = 6
Work Step by Step
Using divisibility rules, we know that a number is divisible by 4 if its last two digits make a number that is divisible by 4. In 4|963,23d, we look at 3d with d being unknown. When we substitute each of the numbers, 0 - 9, into 3d for d, we find that only 32 and 36 are divisible by 4. Therefore, d = 2 and d = 6.