Question

Using the following digits, from the greastest and smallest 6 digits noumber.

DIGITS greatest no. Smalest no.

8,7,6, 9

Answer 1

A six digit number cannot be formed by using only 4 numbers without repeatition. So we need to assume that we are repeating the numbers.
So by repeating the the numbers and using all the numbers atleast once we need to get smallest and largest numbers
For the largest number we need to repeat 9 three times in first three digits and other number can be used in the descending order
So the largest number is 999876
Similarly for the lowest number we need to use 6 three times in the first three digits and other number can be used in the ascending order.
So the smallest number is 666789