152. For how many natural numbers less than $50$, is $7^n + 42$ divisible by $43$? (1) $8$ (2) $7$ (3) $8$ (4) $9$
\textbf{152.} For how many natural numbers less than $50$, is $7^n + 42$ divisible by $43$?
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(1) $8$ \hfill (2) $7$ \hfill (3) $8$ \hfill (4) $9$
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