Start of the qual­i­fy­ing round

Here is the qual­i­fy­ing (remote) round of the com­pet­i­tion. You can solve prob­lems until Novem­ber 12, 2018.

Please remem­ber that your solu­tion of every prob­lem should include not only the right answer but the full reas­on­ing as well.

We will be happy if your friends who like math­em­at­ics also par­ti­cip­ate. How­ever, every assign­ment should be done indi­vidu­ally; oth­er­wise, your sub­mis­sion will not be considered.

Please be care­ful with pre­par­a­tion of your work, fol­low the rules and provide all neces­sary data. You do not need to include prob­lem state­ments into your sub­mis­sion; please write down your solu­tions only.

You can write your solu­tions by hand and scan them or type them using a text edit­or. Solu­tions should be writ­ten in Esper­anto, Eng­lish, French, Geor­gi­an, Ger­man, Per­sian, Romani­an, Rus­si­an, Span­ish, Ukrain­i­an, or Uzbek. Use of oth­er lan­guages should be agreed with the organ­izers in advance. For anonym­ous grad­ing, you should not write your name on the paper sheets with solutions.

The win­ners of Olympi­ad 2017/18 (those with Dip­lo­mas I‑III) can par­ti­cip­ate dir­ectly in the final round.

Prob­lems

How to sub­mit solutions

The solu­tions should be sub­mit­ted to the Jury by Novem­ber 12. If you have received any instruc­tions from your loc­al organ­iz­ing com­mit­tee or a teach­er, please fol­low them.

Oth­er­wise, please type or scan your solu­tions into one of the fol­low­ing formats: txt, doc, odt, pdf, jpg. The files should not con­tain your name (even in the file names).

Before sub­mit­ting your solu­tions, please fill in an online-ques­tion­naire.  Then you can email your solu­tions to [email protected]​formulo.​org (from the address indic­ated as your email address in the ques­tion­naire). You can attach sev­er­al files or cre­ate a .zip archive. Please indic­ate your grade of par­ti­cip­a­tion (R5, …, R11) in the Sub­ject line.

Altern­at­ively, you can down­load a pdf file of the ques­tion­naire and add your answers or cre­ate a text file in anoth­er com­mon format. Please attach your ques­tion­naire as a sep­ar­ate file to the same message.

Any ques­tions?

You can send your ques­tions to the organ­izers (but not the solu­tions of prob­lems) to [email protected]​formulo.​org.

 GOOD LUCK!