SOLVE:
RADAR=(R+A+D)^4
Each letter stands for a certain digit.
RADAR is the fourth power of R+A+D. Also 10^4 < RADAR < 10^5.
Then take the fourth roots to get 10 < (R+A+D) < 17.8.
Then R+A+D is limited to 11,12,13,14,15,16,17.
At this point its pretty easy to compute the fourth powers of the seven integers:
11^4 = 14641
12^4 = 20736
13^4 = 28561
14^4 = 38416
15^4 = 50625
16^4 = 65536
17^4 = 83521
The only one that matches the pattern RADAR is 14641, and in this case R+A+D does evaluate to 11. So then the answer is 14641 = (1+4+6)^4.
Solution
