Question and Answers Forum

All Questions      Topic List

Algebra Questions

Previous in All Question      Next in All Question      

Previous in Algebra      Next in Algebra      

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

Commented by MJS last updated on 06/Jan/20

anyway the question is stupid. there is only  one power of 7 in 50!

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

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

7=1×7  14=2×7  21=3×7  ...  42=6×7  49=7×7  totally 8 times 7  ⇒7^8  is in 50!

$$\mathrm{7}=\mathrm{1}×\mathrm{7} \\ $$$$\mathrm{14}=\mathrm{2}×\mathrm{7} \\ $$$$\mathrm{21}=\mathrm{3}×\mathrm{7} \\ $$$$... \\ $$$$\mathrm{42}=\mathrm{6}×\mathrm{7} \\ $$$$\mathrm{49}=\mathrm{7}×\mathrm{7} \\ $$$${totally}\:\mathrm{8}\:{times}\:\mathrm{7} \\ $$$$\Rightarrow\mathrm{7}^{\mathrm{8}} \:{is}\:{in}\:\mathrm{50}! \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com