SPACE ACADEMY · TRY, THINK, PLAY
Translate representations, use place value and solve constrained number clues.
Just a quick try. Not saved; no game rewards.
ExploreBuilding numbers
Choose an answer.
Line up the cards from the biggest digit first, then fill in the rest.
Sorted from biggest to smallest: 97430.
ReasonPlace value
Choose an answer.
Check each number against every clue, not only the first one.
272010 fits every clue: a multiple of 6; between 271984 and 272040; even; digit sum 12; thousands digit 2.
StretchFactors and multiples
Choose an answer.
Work out the value of each one first, then compare the four numbers.
5th multiple of 8 = 40; LCM of 20 and 30 = 60; HCF of 14 and 21 = 7; Number of factors of 18 = 6. The smallest is 6.
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 Command bridge in Galaxy Command. 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 5 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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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.