Start of the qualifying round

General principles

Here is the qual­i­fy­ing (remote) round of the com­pet­i­tion. You can solve prob­lems until Novem­ber 13, 2017.

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 2016/17 (those with Dip­lo­mas I-III) can par­ti­cip­ate dir­ectly in the final round.

Problems

Prob­lems in Eng­lish

Prob­lems in French

Prob­lems in Geor­gi­an

Prob­lems in Per­sian

Prob­lems in Rus­si­an

Prob­lems in Span­ish

Prob­lems in Ukrain­i­an

Prob­lems in Uzbek

How to submit solutions

Before sub­mit­ting your solu­tions, please fill in a ques­tion­naire. (Down­load it in Excel format if MS Excel is avail­able. Oth­er­wise, down­load it as pdf and add your answers or cre­ate an .odt or a .txt file.)

The solu­tions should be sub­mit­ted to the Jury by Novem­ber 13. If you 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). Then you can email your solu­tions to [email protected]​formulo.​org. You can attach sev­er­al files or cre­ate a .zip archive. Please attach your ques­tion­naire as a sep­ar­ate file to the same mes­sage. Please indic­ate your grade of par­ti­cip­a­tion (R5, …, R11) in the Sub­ject line.

Any questions?

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

GOOD LUCK!