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Algebra novelt problem

dcowboys107
in Mathematics

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2 + 1 + 3 + 2 = 8

 

 

 

The number 21328 has a unique feature: The sum of the first four digits equals the units digit. How many EVEN five-digit numbers have this unique property?

There are 34 different numbers that match.

11114

22228

51118,15118,11518,11158

31116,13116,11316,11136

42118 and permutations of the first four digits make 12 more

32218 and permutations of the first four digits make 12 more

forgot 22116 and its permutations. That should bring the total to 40.

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