Which Maths Olympiad Should My Child Take? A Decision Guide For Parents

Every brochure says the same thing. Builds problem-solving. Boosts confidence. Recognised nationwide. None of that helps you choose.

So here is the honest version. Five maths Olympiads, how they really differ, and which one suits which kind of child. If you read nothing else, read the next section.

One thing to say up front: this is our opinion. It comes from working closely with these exams, student feedback and reading a lot of their past papers and content, but it rests on judgement calls, and plenty of teachers and parents will weigh things differently. Take it as an informed starting point, not the final word.

The Short Answer

Match the exam to the child you have today, not the one the brochure imagines.

• First Olympiad ever, and you want a benchmark? SOF IMO. The biggest field, a report that shows exactly where your child stands, and a paper that rewards visual pattern-spotting and careful reading.
• A fast, confident calculator who works well against a clock? SilverZone iOM. A formula-driven sprint with only 40 minutes, and the toughest of the five for most children.
• Strong at school maths, and you would rather skip the trick questions? UIMO or ITO. Both stay close to the textbook and test depth over gimmicks. ITO is the gentlest way in.
• School doesn't run Olympiads, or you want to sit it from home? CREST CMO. The only fully online exam, with fast digital reporting and no school registration needed.
• Already done a cycle and want steady practice? ITO IMO, for its second round and its monthly practice olympiad.

You do not have to pick just one. Plenty of families sit two in a year. But if this is the start, one is plenty.

So Which Is Hardest?

Difficulty is the hardest thing to pin down here, and any neat league table of "easiest to hardest" oversells it. A paper that floors one child is comfortable for another, and the same exam can feel gentle at Class 3 and stretchy at Class 5. So treat the following as broad character sketches, not a precise ranking.

What we can say, from the way the papers are built, is this. UIMO and ITO tend to feel the most approachable, because both stay close to school maths and lean on application rather than tricks. SOF sits in the middle for most children, though its challenge is less about hard sums and more about reading and pattern-spotting: its word problems run to three or four sentences, and its Achievers questions bundle several statements into one. CREST feels broadly similar to SOF, just delivered online and in a more compact paper. SilverZone is the one most children find toughest, and the reason is the clock as much as the questions. It packs a formula-heavy paper into about 40 minutes, roughly a third less time than the others, so it rewards fast, accurate calculation and punishes anyone who needs to stop and think.

One myth worth busting while we are here. SilverZone has a reputation as the reasoning-heavy exam, but at the primary level that is not quite right. For Class 4 it sets 5 reasoning questions and 5 in the Scholar's Zone out of 30. SOF, by contrast, devotes a fixed 10 of its 35 questions, nearly a third of the paper, purely to Logical Reasoning. If your child's weak spot is reasoning, SOF is the one that will test it hardest at this age.

One thing worth flagging on UIMO. It is a soft landing for younger children, but its Class 5 paper starts reaching into topics that belong to higher grades, such as percentages, ratio and speed. Easy at Class 3, and it can catch you off guard at Class 5.

The Five, One By One

SOF IMO is the one most children start with, and for good reason. Its character is more about reading and pattern-spotting than raw calculation. The paper carries a large Logical Reasoning block full of visual matrices, mirror images and shape sequences, word problems that run several sentences long, and a short Achievers section at the end. Watch that Achievers section closely. Its questions often bundle three separate true-or-false statements, or a match-the-following grid, and one slip on a single sub-part loses the whole 2 to 3 marks. Two things set SOF apart beyond the paper itself: the sheer size of the field, which makes a rank mean something, and a Student Performance Report that shows how your child did topic by topic and against peers. That report alone is worth the entry.

SilverZone iOM is, above all, a speed exam. Its difficulty is not about volume of reasoning, it is about pace. The paper is formula-driven and closely tied to the school board, but it gives your child only about 40 minutes, against the hour most of the others allow. There is no room to sit and draw out a logic table; the maths has to be quick and close to automatic. Marks are scaled rather than flat, so the paper totals a clean 100, with the higher-order Scholar's Zone questions carrying the most. It rewards a fast, confident calculator and unsettles a child who likes to take their time.

UIMO is the textbook exam. It stays close to school maths and skips the trick riddles, so it rewards the child who genuinely understands the core ideas over the one who has memorised shortcuts. You can enter through school or directly online, and its top prizes happen to be the biggest on this list.

ITO IMO is the softest landing. Easy in difficulty, generous in practice: a qualifying second round, plus a monthly practice olympiad all year for families who want steady, low-stakes reps rather than one big day.

CREST CMO is the online one. Your child sits it from home in a flexible window, and the report lands fast. The paper is compact, a short practical-maths section and then a higher-value Achievers set. Good if you would rather skip the ceremony of a school hall.

And If They Qualify For Level 2

Four of these run a second round for children who qualify: SOF, SilverZone, ITO and CREST. Two are worth calling out, because they behave very differently.

SOF's Level 2 is the real step up. It drops the Logical Reasoning section entirely, raises the maths to a distinctly harder tier, and moves your child to an external, proctored exam centre. It is the closest thing to a serious competitive exam at this age, and worth knowing about before you start, because it changes what "doing well in SOF" eventually asks of a child.

SilverZone's Level 2 stays closer to the school curriculum. It is an extension of Level 1 rather than a fresh challenge, which makes it demanding but far more predictable to prepare for.

The Money Side

Fees first, because they matter least. None of these will break the bank. For the primary classes most sit somewhere between ₹150 and ₹275 an exam, with UIMO and SilverZone cheaper, SOF a little above, and ITO and CREST at the top once ITO's second round is added. Numbers shift by year and by school, so confirm on the official site before you register.

Prizes are where they differ. UIMO swings big, with a substantial cash prize for its overall topper and devices for class rank-holders. SOF spreads cash across its top international and zonal ranks, and hands every participant a detailed performance report. CREST works on percentiles, so medals go to the top slice of scorers rather than a fixed few ranks.

But be honest with yourself about this. For all but a handful of children, the medal is not the point. The report is. Knowing your child is strong on geometry and shaky on measurement is worth more over a year than any certificate on the wall.

Where We'd Start

If you are starting from scratch, this is the order we would suggest.

Begin with SOF IMO. The field is large, the difficulty is fair, and the performance report gives you a real map of your child's strengths and gaps. Use that map to guide a term of focused practice.

If your child takes to it and has quick, confident mental maths, add SilverZone iOM the following cycle to build speed under a tight clock. If instead you want gentle, steady practice, ITO's monthly olympiad is a kinder rhythm. Keep CREST in mind for the year you would rather sit an exam calmly from home.

Whatever you choose, choose one to begin with. A single Olympiad done properly, with a real look at the results afterwards, beats five entered in a rush.