Question

34,58_; factors are 3 and 4:
Supply the missing digit.

Answer 1

34,584

Explanation:

For 3 to be a factor, the sum of digits must be a multiple of 3. That allows the missing digit to be 1, 4, 7.

For 4 to be a factor, the last two digits must be a number divisible by 4. That allows the missing digit to be 0, 4, 8.

The digit that makes the number have factors of both 3 and 4 is 4.