SOLVE:
RADAR=(R+A+D)^4
Each letter stands for a certain digit.
(In reply to
No Subject by Larry)
No, Larry. abcba is not necessarily divisible by 11. Consider for example 00100, which is not divisible by 11.
The test for divisibility by 11 is whether the digits in odd numbered positions minus the digits in even numbered positions are divisible by 11. So any palindrome with an even number of digits is divisible by 11, but most palindromes with an odd number of digits are not.
14641 is divisible by 11 only because 1 - 4 +6 -4 +1 =0, which is divisible by 11.
Edited on July 2, 2023, 3:05 pm
re: No Subject
