SOLUTION: how many four digit palindromes can you make so that the sum of the middle two digits is twice the sum of the outer two numbers?
Algebra.Com
Question 258331: how many four digit palindromes can you make so that the sum of the middle two digits is twice the sum of the outer two numbers?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
1221
2442
3663
4884
.
Ed
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