Question

Now make the greatest and the smallest 4 digit number by using any one digit twice 3,8,7

Answer 1

greatest no. =>8873
smallest no. =>3378

Answer 2

heya mate here is your answer

Given
three numbers are 3,8,7

in these 3 is smaller so if you used 3 two times and arranging them in ascending order then u will get the smallest number
here is that

1st step
using 3, 2 times
33- -

next keeping in ascending order
3378
so, small number = 3,378

and also in 3,8,7 , eight is the great number , so using 8 two times and arranging them in descending order will give u greater number

1st step
using 8, 2times
88- -

next keeping in descending order
8873
so, greater number is 8873

i hope ot helped you