SOLUTION: James did the following addition problem: 440 + 340 = 1000. This problem is done correctly. In what base was James writing his numbers?

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Question 43432: James did the following addition problem: 440 + 340 = 1000. This problem is done correctly. In what base was James writing his numbers?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Well it had to be at least base 8...let's see
440 base 8 = 4x64 + 4x8 = 288
340 base 8 = 3x64 + 4x8 = 224
1000 base 8 = 1x512 = 512
Must be base 8...