Form the greatest and smallest 4-digit number formed by using any four different digits,with the given conditions.
ii)digit 3 is always in tens place.

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Solution

Step 1: The greatest 4-digit number formed by using any four different digits is 9999.
According to the question, digit 3 has to be in tens place.
So, the greatest 4-digit number with 3 in tens place is 9939.
Step 2: The smallest 4-digit number formed by using any four different digits is 1000
According to the question, digit 3 has to be in tens place.
So, the smallest 4-digit number with 3 in tens place is 1030
Hence, the required answer are 9939 and 1030.

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