Question

Now make the greatest and the smallest 4-digit numbers by using any one digit twice, from the following digits.

3,8,7

Answer 1

We, need to make the greatest and the smallest 4-digit numbers by using any one digit twice, from the following digits
3, 8, 7

Let us arrange the given numbers in descending order:

8 > 7 > 3

To form the greatest number we will use the greatest digit twice i.e. 8 and similarly we will use 3 twice to form the smallest number.

Clearly, 8873 is the greatest and 3378 is the smallest.