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Question Number 77451 by BK last updated on 06/Jan/20

Commented by MJS last updated on 06/Jan/20

$$\mathrm{anyway}\mathrm{the}\mathrm{question}\mathrm{is}\mathrm{stupid}.\mathrm{there}\mathrm{is}\mathrm{only}$$$$\mathrm{one}\mathrm{power}\mathrm{of}7\mathrm{in}50!$$

Answered by mr W last updated on 06/Jan/20

$$7=1\times 7$$$$14=2\times 7$$$$21=3\times 7$$$$...$$$$42=6\times 7$$$$49=7\times 7$$$$totally8times7$$$$\Rightarrow 7^{8}isin50!$$

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