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whats the remainder when 2^k divided by 10 I. k dividable by

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Director
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whats the remainder when 2^k divided by 10 I. k dividable by [#permalink] New post 02 Jun 2007, 04:52
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whats the remainder when 2^k divided by 10
I. k dividable by 10
II. k dividable by 4

Please explain
Director
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Joined: 13 Mar 2007
Posts: 550
Schools: MIT Sloan
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 [#permalink] New post 02 Jun 2007, 16:55
(E)

Say k =0,

st 1 = remainder 10

Say k = 10,

st1 = remainder 4

Insufficient


Again for K =0,

st2 = remainder 10

k=8,

st2 = remainder 6

Insufficient

st1 and st2 k=0 and k=20 give different remainders

Insufficient
  [#permalink] 02 Jun 2007, 16:55
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whats the remainder when 2^k divided by 10 I. k dividable by

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