Start of the qual­i­fy­ing stage

Start of the qual­i­fy­ing round
Here are the prob­lems for the qual­i­fy­ing round of the Olympi­ad. Remem­ber that the solu­tion to a prob­lem must include not only the cor­rect answer but also a full justification.

We would be happy to have your friends who enjoy math­em­at­ics par­ti­cip­ate in the Olympi­ad. How­ever, sub­mis­sions show­ing signs of copy­ing or «col­lect­ive effort» will not be considered.

You do NOT need to copy the prob­lem state­ments into your submission.

Sub­mis­sions may be writ­ten in Rus­si­an, Eng­lish, or Turk­ish. The use of oth­er lan­guages ​​must be approved by the organ­izers in advance. Prize-win­ners of the 2025/26 «For­mula of Unity» / «Third Mil­len­ni­um» Math­em­at­ics Olympi­ad will be invited dir­ectly to the final round.

Pro­ced­ure for Sub­mit­ting Solutions
The prob­lems are pub­lished here on the Olympi­ad web­site, while solu­tions must be uploaded via the inform­a­tion sys­tem (your per­son­al account) at is​.for​mulo​.org.

Please note: in your per­son­al account, there is a large blue but­ton in the top-right corner labeled «Olympi­ad Inform­a­tion.» This sec­tion con­tains all rel­ev­ant details about the Olympi­ad, includ­ing the prob­lem state­ments, ensur­ing that everything you need is read­ily available.

Pre­pare the solu­tion for each prob­lem as a sep­ar­ate file, register in the inform­a­tion sys­tem, and upload your solu­tions through your per­son­al account no later than 23:59:59 UTC on Novem­ber 5, 2026 (02:59:59 Moscow time on Novem­ber 6).

Be sure to read the instruc­tions for participation

Import­ant: if you already have an account, you DO NOT NEED to cre­ate a new one.

You can upload either text files (TXT, DOC, DOCX, PDF) or scans of hand­writ­ten work (JPG, PNG). Each prob­lem must be uploaded under its cor­res­pond­ing num­ber. Solu­tion files must not con­tain the par­ti­cipant’s sur­name, first name, or any oth­er per­son­al information.

We do not accept qual­i­fy­ing round sub­mis­sions via any oth­er method.

Ques­tions?
Organ­iz­ing com­mit­tee email: olimp@​formulo.​org (not for sub­mit­ting solutions).
Tech­nic­al sup­port: isys@​formulo.​org.
Olympi­ad news — on the Tele­gram channel.

Good luck!