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Question

Make the greatest and the smallest 4-digit number using any four different digits with the given condition. 4 is always in the thousand's place.


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Solution

Largest and smallest four-digit number.

Given: 4 should be at the thousand's place.

We can fill the other places using the digits from 1-9. Therefore,

The largest four-digit number is 4999. [Because 9 is greatest among 1-9 ]

The smallest four-digit number is 4000. [Because 0 is lowest among 1-9 ]

Hence 4999 is the largest and 4000 is smallest number.


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