Divisilibility tests for 9

Q.

Fill in the blank with smallest digit to make $.......6724$ divisible by $3.$

Q.

Fill in the blank with smallest digit to make $189....44$ divisible by $3.$

Q. All numbers which are divisible by 4 may not be divisible by 8.​

A) True B) Fasle

Q. Check the following numbers for divisibility by 4.
i) 564 ii) 546 iii) 456