SPACE ACADEMY · TRY, THINK, PLAY
Read equal parts, compare the same whole and reason about a changed or remaining quantity.
Just a quick try. Not saved; no game rewards.
ExploreFractions of a group
Choose an answer.
Count the pieces given away in total, then take them from the whole apples.
3 pieces of 1/2 make 1 1/2. 4 - 1 1/2 = 2 1/2.
ReasonReading fractions
Choose an answer.
The bottom number counts all equal parts. The top number counts the parts asked about.
The figure has 9 equal parts: 7 shaded and 2 not shaded. The fraction is 7/9.
StretchReading fractions
Choose an answer.
Write both amounts with the same denominator, then add or subtract the fractions.
Priya has 3 1/5 kg.
A game mission has 8 untimed questions. Only the game saves choices and hints. A finished mission earns one launch charge and participation towards the Left power wing in Nebula Research Station. The chapter goal is 8 different questions in finished sets; hints and wrong answers count as participation, not mastery. Some craft systems link more than one chapter.
Foundations: read a representation and practise the underlying idea.
Paper-style reasoning: connect clues, interpret a diagram or work backwards.
Higher-order practice: link conditions, test statements and avoid a tempting wrong method.
Levels change representations, clues and conditions, not just the numbers. These are practice formats, not validated exam-equivalent difficulty.
Learning reports distinguish hinted answers from independent first choices. They consider up to 20 recent different, unhinted questions per skill and level, and wait for at least five before suggesting extra practice. Repeating the same question does not add evidence. Reports are practice evidence, not IQ scores, diagnoses, ranks or predictions of competition results.
Ask the learner to explain a drawing or check with objects too. Choose Explore or an earlier chapter when a step feels too large.
The grade topics use SOF IMO Class 4 published topic syllabus as their primary reference. The SOF sample and CREST previous-year paper below informed representations and reasoning demands. Providers have different topic boundaries; their syllabi are not interchangeable.
Questions, diagrams, picture choices, hints and explanations are original Otterly work, not copied paper questions or publisher artwork. No Olympiad provider is affiliated with or endorses Space Academy. This is not complete exam preparation; follow classroom teaching and check the current official syllabus too. Independent educator review is still needed for difficulty and breadth.
Content and coverage notes. To report a confusing question, describe the grade, chapter, level and question on the contact page. Do not send children’s personal information.
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Original Otterly practice, not an official exam. Game progress stays on this browser.