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ethanhunt786
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What are the last two digits of 7^2008? 16 Dec 2016, 01:35
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

45% (medium)

Question Stats:

100% (02:03) correct 0% (00:00) wrong based on 5 sessions

History

Date
Time
Result
Not Attempted Yet
What are the last two digits of \(7^{2008}\)?

(A) 21
(B) 61
(C) 01
(D) 41
(E) 81



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C
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vitaliyGMAT
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What are the last two digits of 7^2008? 16 Dec 2016, 01:41
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ethanhunt786
What are the last two digits of \(7^{2008}\)?

(A) 21
(B) 61
(C) 01
(D) 41
(E) 81

\(7^{2008} = 49^{1004} = 01^{502} = 01\)

Answer C
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blueseas
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What are the last two digits of 7^2008? 16 Dec 2016, 02:16
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vitaliyGMAT
ethanhunt786
What are the last two digits of \(7^{2008}\)?

(A) 21
(B) 61
(C) 01
(D) 41
(E) 81

\(7^{2008} = 49^{1004} = 01^{502} = 01\)

Answer C

Better way:
\(7^{2008} = 49^{1004} = 2401^{502} = 01\)



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