Question

Insert a digit in each place "..." to make numbers that are divisible by 6

if it is possible:
4...9

Answer 1

the question isn't possible to answer because 9 is not divisible by 6

Answer 2

It is not possible to make 4_9 divisible by 6

Explanation:

A number that is divisible by 6 will be divisible by 2 and by 3. An integer is divisible by 2 if its units digit is even. An integer is divisible by 3 if the sum of its digits is divisible by 3.

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The given number has a units digit of 9, which is not even. The number cannot be made divisible by 2 for any inserted digit.

It is not possible to make 4_9 divisible by 6.