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IMO vs iOM vs UIMO vs CMO: maths olympiads compared

Updated 10 Nov 2026
Reading time 2 minutes

OlympiadOrganiserRegistersWhereFeeNext date
IMOSOFSchool onlyIn school₹17026 Nov
UIMOUnified CouncilYou or schoolSchool or home₹150 school · ₹350 online10 Jan
CMOCRESTYou or schoolOnline, at home₹27510 Dec
SilverZone iOMSilverZoneYou or schoolSchool or homeFee at registration18 Nov
Little Star Mathematics OlympiadSilverZoneYou or schoolSchool or homeFee at registration7 Dec
HMOHumming BirdYou or schoolSchool or home₹150 to ₹200Dates not out
Indian Talent IMOIndian TalentYou or schoolSchool or home₹175 school · ₹500 online1 Dec
IFMOIOFYou or schoolOnline, at home₹15012 Dec

Which maths olympiads can I register my child for myself?

UIMO, CMO, SilverZone iOM, Little Star Mathematics Olympiad, HMO, Indian Talent IMO, IFMO.

Only through the school: IMO.

Which maths olympiads can my child take from home?

UIMO, CMO, SilverZone iOM, Little Star Mathematics Olympiad, HMO, Indian Talent IMO, IFMO.

Which maths olympiad is best?

None is best for every child. They follow the school syllabus with multiple-choice papers; the real differences are who can register, where your child sits the paper, the fee and the rounds. Start with the ones your child can take, and their dates.

What is the difference between IMO and UIMO?

IMO is run by SOF. Who registers: school only. Where: in school. Fee: ₹170. UIMO is run by Unified Council. Who registers: you or school. Where: school or home. Fee: ₹150 school · ₹350 online.

What is the difference between IMO and CMO?

IMO is run by SOF. Who registers: school only. Where: in school. Fee: ₹170. CMO is run by CREST. Who registers: you or school. Where: online, at home. Fee: ₹275.

What is the difference between IMO and SilverZone iOM?

IMO is run by SOF. Who registers: school only. Where: in school. Fee: ₹170. SilverZone iOM is run by SilverZone. Who registers: you or school. Where: school or home. Fee: shown at registration.

Keep reading

Checked on each organiser's own website, 25 Oct 2026. Rules and dates can change; their site is always final. Olympiad Owl is not linked to any organiser.