Form the greatest and the smallest $4 -$ digit numbers using any four different digits with the condition that digit $5$ is always at the ten's place.

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Solution

The condition for $4$ -digit number of four different digits is that $5$ is at ten's place.
The greatest $4 -$ digit number will be $9857$ and the smallest $4 -$ digit number will be $1052$

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a.) Largest 4-digit number using any four different digits with digit 5 always at the tens place	i.)1032
b.) Largest 4-digit number formed from the digits 5, 0, and 7 by using any one digit twice	ii.)3399
c.) Smallest 4-digit number using any four different digits with digit 2 always at the ones place	iii.)7750
d.) Smallest 4-digit number formed using the digits 3 and 9 equal number of times	iv.)9857

Question 172

Make the greatest and smallest 5 digit numbers using different digits without repetition, in which 5 appears at ten's place.

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