Question and Answers Forum

All Questions      Topic List

Number Theory Questions

Previous in All Question      Next in All Question      

Previous in Number Theory      Next in Number Theory      

Question Number 19389 by tawa tawa last updated on 10/Aug/17

What is the digital root of  3^(2017)

$$\mathrm{What}\:\mathrm{is}\:\mathrm{the}\:\mathrm{digital}\:\mathrm{root}\:\mathrm{of}\:\:\mathrm{3}^{\mathrm{2017}} \\ $$

Answered by allizzwell23 last updated on 10/Aug/17

   1×9 = 9     2×9 = 18 = 1+8 = 9     3×9 = 27 = 2+7 = 9    .............     3^(2017)  = 3^(2015) ×9  = 9    Hence, the digital root is 9

$$\:\:\:\mathrm{1}×\mathrm{9}\:=\:\mathrm{9} \\ $$$$\:\:\:\mathrm{2}×\mathrm{9}\:=\:\mathrm{18}\:=\:\mathrm{1}+\mathrm{8}\:=\:\mathrm{9} \\ $$$$\:\:\:\mathrm{3}×\mathrm{9}\:=\:\mathrm{27}\:=\:\mathrm{2}+\mathrm{7}\:=\:\mathrm{9} \\ $$$$\:\:............. \\ $$$$\:\:\:\mathrm{3}^{\mathrm{2017}} \:=\:\mathrm{3}^{\mathrm{2015}} ×\mathrm{9}\:\:=\:\mathrm{9} \\ $$$$\:\:\mathrm{Hence},\:\mathrm{the}\:\mathrm{digital}\:\mathrm{root}\:\mathrm{is}\:\mathrm{9} \\ $$

Commented by tawa tawa last updated on 10/Aug/17

God bless you sir.

$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir}. \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com