Elise wrote all possible four-digit numbers using two of the digit 2 and two of the digit 0. Two of Elise's numbers have a greater difference than any other pair. What is that difference?

The required difference is 198.

Step-by-step explanation:

The four digit smallest number using 2,2,0,0 is = 2002

The four digit largest number using 2,2,0,0 is = 2200

Therefore the difference between 2200 and 2002 is = 198