SOLUTION: 2 to the power of 10 minus 4 is divisible by a)31 b)11 c)9 d) 7 e) 5

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Question 198102: 2 to the power of 10 minus 4 is divisible by
a)31 b)11 c)9 d) 7 e) 5
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
2%5E%2810%29+-+4
2%5E8%2A2%5E2+-+2%5E2
2%5E2%282%5E8+-+1%29
2%5E2+%28256-1%29
2%2A2+%2A+255
2+%2A+2+%2A+5+%2A+3+%2A+17
So you can see that 5 is a factor. None of the other options given are factors