Question and Answers Forum

All Questions      Topic List

Permutation and Combination Questions

Previous in All Question      Next in All Question      

Previous in Permutation and Combination      Next in Permutation and Combination      

Question Number 149437 by SLVR last updated on 05/Aug/21

Commented by SLVR last updated on 05/Aug/21

$$kindlysolutionplease$$

Answered by Olaf_Thorendsen last updated on 05/Aug/21

$$\bullet 1-\mathrm{digit}\mathrm{numbers}:$$$$9\mathrm{between}1\mathrm{and}9\Rightarrow 9\mathrm{digits}$$$$\bullet 2-\mathrm{digits}\mathrm{numbers}:$$$$90\mathrm{between}10\mathrm{and}99\Rightarrow 180\mathrm{digits}$$$$\bullet 3-\mathrm{digits}\mathrm{numbers}:$$$$900\mathrm{between}100\mathrm{and}999\Rightarrow 2700\mathrm{digits}$$$$$$$$2021=9+180+1832$$$$2021=9+180+(3\times 610+2)$$$$\mathrm{The}{2021}^{\mathrm{th}}\mathrm{digit}\mathrm{is}\mathrm{the}\mathrm{second}\mathrm{digit}$$$$\mathrm{of}{611}^{\mathrm{th}}3-\mathrm{digits}\mathrm{number}.$$$$\mathrm{The}{611}^{\mathrm{th}}3-\mathrm{digits}\mathrm{number}\mathrm{is}710.$$$$\Rightarrow \mathrm{Result}\mathrm{is}1.$$

Commented by SLVR last updated on 05/Aug/21

$$yeah...GreatProf.olaf....nice$$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com