Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
1 Answer
- 1 decade agoFavorite Answer
2009
(9-2)^4 = 2401
(9-2)^3 = 343
(9-2)^2 = 49
2401-343-49 = 2009
a must be from 1-9 (if a=0 it would be a 3 digit number) and b,c,d must be from 0-9
if d-a = 5 or less then we would not end up with a 4 digit number
so d-a must be 6 or greater
the highest number d can be is 9 and the lowest number a can be is 1 so d-a can be no higher than 8
therefore d-a must be 6, 7, or 8
Fill in each of these numbers for d-a and you'll see that only 7 creates a solution.
