Question

Replace* by the smallest digit to make the following numbers divisible by3. a) *6724

Answer 1

Answer: the answer is 2

Step-by-step explanation:

1] for any number to be divisible by 3, the sum of its digits must be divisible by 3

here, therefore presently without the digit to be replaced the sum is

   6+7+2+4=19

19 is not divisible by 3 but the number 21 is divisible by 3

therefore the number to be replaced is 2,

and now the new sum is,

     2+6+7+2+4=21