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(A) The total number of $4$-digit numbers is $9999 - 999 = 9000$.$A$ $4$-digit number is divisible by $5$ if its last digit is $0$ or $5$.For the firs

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$7200$

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(A) The total number of $4$-digit numbers is $9999 - 999 = 9000$.$A$ $4$-digit number is divisible by $5$ if its last digit is $0$ or $5$.For the first digit,there are $9$ choices $(1-9)$.For the second and third digits,there are $10$ choices each $(0-9)$.For the last digit,there are $2$ choices ($0$ or $5$).So,the number of $4$-digit numbers divisible by $5$ is $9 	imes 10 	imes 10 	imes 2 = 1800$.Therefore,the number of $4$-digit numbers not divisible by $5$ is $9000 - 1800 = 7200$.

The number of $4$-digit numbers that are not divisible by $5$ is:

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