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Which one of the following will completely divide \( \Large 5^{71}+5\sqrt{72}+5^{73} \)?

A) 150
B) 160
C) 155
D) 30

Correct Answer:



C) 155

Description for Correct answer:
\( \Large 5^{71}+5^{72}+5^{73} \)

\( \Large = 5^{71}(5^{0}+5^{1}+5^{2}) \)

\( \Large =5^{71}(1+5+25) \)

\( \Large 5^{71} \times 31=5^{70} \times 155 \)

Check with option, so 155 is answer

Part of solved Number series questions and answers : >> Aptitude >> Number series

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