SPACE ACADEMY · TRY, THINK, PLAY
Read original figures, distinguish their properties and use the conditions shown in a diagram.
Just a quick try. Not saved; no game rewards.
ExploreArea and composite shapes
Choose an answer.
Subtract the corner rectangle from the large rectangle.
One area is 8 x 5 - 4 x 2 = 32. That is 32 square cm.
ReasonPerimeter
Choose an answer.
A square has four sides of the same length.
4 × 38 = 152 cm.
StretchPerimeter
Choose an answer.
Sides facing each other add to the same total. Half the perimeter is width plus height.
The stepped sides add up to the same as the full width and height. Half of 58 is 29, so X = 29 - 21 = 8 cm.
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 Habitat ring 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.
Game progress stays only in this browser, in three anonymous explorer slots. Clearing site data or closing a private session may remove it. Download a private backup from Help & saves; there is no cloud sync. The game checks saves before play and stops on save failures rather than pretending progress was saved.
These page examples never change a saved game. Game links carry question settings, not a learner’s answers. There are no names, school details, public profiles, chat, analytics or advertising SDKs in the game. Grown-up guidance · Privacy
Original Otterly practice, not an official exam. Game progress stays on this browser.