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 211311 by a.lgnaoui last updated on 05/Sep/24

$$\mathbf{Dterminer}\mathbf{le}\mathbf{nombre}\mathbf{total}\mathbf{des}\mathbf{nombres}$$$$\mathbf{de}\left(3\mathbf{chiffres}\right)\mathbf{qui}\mathbf{sont}\mathbf{impair}\left(\mathbf{et}\right)\mathbf{divisibles}$$$$\mathbf{par}9\mathbf{compris}\mathbf{entre}100\mathbf{et}500.?$$$$\mathbf{formule}\mathbf{si}\mathbf{c}\mathbf{est}\mathbf{possible}?$$$$$$

Answered by mr W last updated on 05/Sep/24

$$thefirstoneis117,thesecondone$$$$is117+18,thethirdoneis117+18+18,$$$$etc.$$$$generally:$$$$N=117+18k$$$$N<500\Rightarrow k⩽21$$$$\Rightarrow 0⩽k⩽21\Rightarrow 22suchnumbers$$

Commented by a.lgnaoui last updated on 05/Sep/24

$$\mathrm{thank}\mathrm{you}\mathrm{very}\mathrm{much}.$$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com